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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                 AMENDMENT NO. 4
                                  SCHEDULE 13D

                                 (Rule 13d-101)
                    Under the Securities Exchange Act of 1934

                        WILTEL COMMUNICATIONS GROUP, INC.
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                                (Name of Issuer)

                          COMMON STOCK, $0.01 PAR VALUE
--------------------------------------------------------------------------------
                         (Title of class of securities)

                                   972487 10 2
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                                 (CUSIP number)

                                JOSEPH A. ORLANDO
                   VICE PRESIDENT AND CHIEF FINANCIAL OFFICER
                          LEUCADIA NATIONAL CORPORATION
                              315 PARK AVENUE SOUTH
                            NEW YORK, NEW YORK 10010


                                 WITH A COPY TO:


                            ANDREA A. BERNSTEIN, ESQ.
                           WEIL, GOTSHAL & MANGES LLP
                                767 FIFTH AVENUE
                            NEW YORK, NEW YORK 10153
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            (Name, address and telephone number of person authorized
                     to receive notices andcommunications)

                                 AUGUST 7, 2003
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             (Date of event which requires filing of this statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box
[_].

Note: Schedules filed in paper format shall include a signed original and five
copies of the Schedule, including all exhibits. The information required on the
remainder of this cover page shall not be deemed to be "filed" for the purposes
of Section 18 of the Securities Exchange Act of 1934 (the "Exchange Act") or
otherwise subject to the liabilities of that section of the Exchange Act but
shall be subject to all other provisions of the Exchange Act.

                         (Continued on following pages)
                               (Page 1 of 7 pages)
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----------------------------------------------------------------------------------                ----------------------------------
CUSIP No.  972487 10 2                                                                  13D
----------------------------------------------------------------------------------                ----------------------------------
                                                                                                            
---------------------- ----------------------------------------------------------- -------------------------------------------------
          1            NAME OF REPORTING PERSON:                                   LUK Acquisition I, LLC
                       S.S. OR I.R.S. IDENTIFICATION NO.
                       OF ABOVE PERSON:
---------------------- -------------------------------------------------------------------------------------------------------------
          2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:                                                 (a) [x]
                                                                                                                         (b) [_]
---------------------- -------------------------------------------------------------------------------------------------------------
          3            SEC USE ONLY

---------------------- ------------------------------------- -----------------------------------------------------------------------
          4            SOURCE OF FUNDS:                      N/A

---------------------- -------------------------------------------------------------------------------------------------------------
          5            CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):               [_]
---------------------- ----------------------------------------------------------- -------------------------------------------------
          6            CITIZENSHIP OR PLACE OF ORGANIZATION:                       Delaware

----------------------------------- -------- ---------------------------------------------------- ----------------------------------
            NUMBER OF                  7     SOLE VOTING POWER:                                   -0-
              SHARES
                                    -------- ---------------------------------------------------- ----------------------------------
           BENEFICIALLY                8     SHARED VOTING POWER:                                 11,775,000 (see Item 5)
             OWNED BY
                                    -------- ---------------------------------------------------- ----------------------------------
               EACH                    9     SOLE DISPOSITIVE POWER:                              -0-
            REPORTING
                                    -------- ---------------------------------------------------- ----------------------------------
           PERSON WITH                10     SHARED DISPOSITIVE POWER:                            11,775,000 (see Item 5)

---------------------- -------------------------------------------------------------------------- ----------------------------------
         11            AGGREGATE AMOUNT BENEFICIALLY OWNED BY REPORTING PERSON:                   11,775,000 (see Item 5)

---------------------- -------------------------------------------------------------------------------------------------------------
         12            CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES:                                [_]

---------------------- -------------------------------------------------------------------------------------------------------------
         13            PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):  23.55%

---------------------- ----------------------------------------------------------- -------------------------------------------------
         14            TYPE OF REPORTING PERSON:                                   OO         (Limited Liability Company)

---------------------- ----------------------------------------------------------- -------------------------------------------------


                                       2

----------------------------------------------------------------------------------                ----------------------------------
CUSIP No.  972487 10 2                                                                  13D
----------------------------------------------------------------------------------                ----------------------------------

---------------------- ----------------------------------------------------------- -------------------------------------------------
          1            NAME OF REPORTING PERSON:                                   LUK Acquisition II, LLC
                       S.S. OR I.R.S. IDENTIFICATION NO.
                       OF ABOVE PERSON:
---------------------- -------------------------------------------------------------------------------------------------------------
          2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:                                                  (a) [x]
                                                                                                                          (b) [_]
---------------------- -------------------------------------------------------------------------------------------------------------
          3            SEC USE ONLY

---------------------- ------------------------------------- -----------------------------------------------------------------------
          4            SOURCE OF FUNDS:                      N/A

---------------------- -------------------------------------------------------------------------------------------------------------
          5            CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):               [_]
---------------------- ----------------------------------------------------------- -------------------------------------------------
          6            CITIZENSHIP OR PLACE OF ORGANIZATION:                       Delaware

----------------------------------- -------- ---------------------------------------------------- ----------------------------------
            NUMBER OF                  7     SOLE VOTING POWER:                                   -0-
              SHARES
                                    -------- ---------------------------------------------------- ----------------------------------
           BENEFICIALLY                8     SHARED VOTING POWER:                                 10,225,000 (see Item 5)
             OWNED BY
                                    -------- ---------------------------------------------------- ----------------------------------
               EACH                    9     SOLE DISPOSITIVE POWER:                              -0-
            REPORTING
                                    -------- ---------------------------------------------------- ----------------------------------
           PERSON WITH                10     SHARED DISPOSITIVE POWER:                            10,225,000 (see Item 5)

---------------------- -------------------------------------------------------------------------- ----------------------------------
         11            AGGREGATE AMOUNT BENEFICIALLY OWNED BY REPORTING PERSON:                   10,225,000 (see Item 5)

---------------------- -------------------------------------------------------------------------------------------------------------
         12            CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES:                                [_]

---------------------- -------------------------------------------------------------------------------------------------------------
         13            PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):   20.45%

---------------------- ----------------------------------------------------------- -------------------------------------------------
         14            TYPE OF REPORTING PERSON:                                   OO         (Limited Liability Company)

---------------------- ----------------------------------------------------------- -------------------------------------------------


                                       3

----------------------------------------------------------------------------------                ----------------------------------
CUSIP No.  972487 10 2                                                                  13D
----------------------------------------------------------------------------------                ----------------------------------

---------------------- ----------------------------------------------------------- -------------------------------------------------
          1            NAME OF REPORTING PERSON:                                   Leucadia National Corporation
                       S.S. OR I.R.S. IDENTIFICATION NO.
                       OF ABOVE PERSON:
---------------------- -------------------------------------------------------------------------------------------------------------
          2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:                                                  (a) [x]
                                                                                                                          (b) [_]
---------------------- -------------------------------------------------------------------------------------------------------------
          3            SEC USE ONLY

---------------------- ------------------------------------- -----------------------------------------------------------------------
          4            SOURCE OF FUNDS:                      N/A

---------------------- -------------------------------------------------------------------------------------------------------------
          5            CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):                 [_]
---------------------- ----------------------------------------------------------- -------------------------------------------------
          6            CITIZENSHIP OR PLACE OF ORGANIZATION:                       New York

----------------------------------- -------- ---------------------------------------------------- ----------------------------------
            NUMBER OF                  7     SOLE VOTING POWER:                                     1,700,000
              SHARES
                                    -------- ---------------------------------------------------- ----------------------------------
           BENEFICIALLY                8     SHARED VOTING POWER:                                 22,000,000 (see Item 5)
             OWNED BY
                                    -------- ---------------------------------------------------- ----------------------------------
               EACH                    9     SOLE DISPOSITIVE POWER:                                1,700,000
            REPORTING
                                    -------- ---------------------------------------------------- ----------------------------------
           PERSON WITH                10     SHARED DISPOSITIVE POWER:                            22,000,000 (see Item 5)

---------------------- -------------------------------------------------------------------------- ----------------------------------
         11            AGGREGATE AMOUNT BENEFICIALLY OWNED BY REPORTING PERSON:                   23,700,000 (see Item 5)

---------------------- -------------------------------------------------------------------------------------------------------------
         12            CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES:                                 [_]

---------------------- -------------------------------------------------------------------------------------------------------------
         13            PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11):  47.40%

---------------------- ----------------------------------------------------------- -------------------------------------------------
         14            TYPE OF REPORTING PERSON:                                   CO

---------------------- ----------------------------------------------------------- -------------------------------------------------



                                       4


Item 1.    Security and Issuer.
           -------------------

           This Statement constitutes Amendment No. 4 ("Amendment No. 4") to the
statement on Schedule 13D (the "Original 13D") filed with the Securities and
Exchange Commission by Leucadia National Corporation ("Leucadia"), and its
subsidiaries, LUK Acquisition I, LLC ("LUK I") and LUK Acquisition II, LLC ("LUK
II"), with respect to the common stock, $0.01 par value per share (the "WilTel
Common Stock"), of WilTel Communications Group, Inc., a Nevada corporation
("WilTel").

           Unless otherwise indicated, all capitalized terms used herein have
the meanings ascribed to them in the Original 13D.

Item 4.    Purpose of Transaction.
           ----------------------

           In response to conversations with the financial advisors to the
independent directors of WilTel subsequent to Leucadia's withdrawal of its May
15, 2003 offer, on August 7, 2003 Leucadia sent a letter (the "Letter") to the
independent directors of WilTel relating to alternative proposals to acquire the
shares of WilTel not already owned by Leucadia. A copy of the Letter is attached
hereto as Exhibit 2 and incorporated herein by reference.

           This communication shall not constitute an offer to sell or the
solicitation of an offer to buy any securities, nor shall there be any sale of
securities in any jurisdiction in which such offer, solicitation or sale would
be unlawful prior to registration or qualification under the securities laws of
any such jurisdiction. No offering of securities shall be made except by means
of a prospectus meeting the requirements of Section 10 of the Securities Act of
1933, as amended.

           Any offer will only be made through a prospectus, which is part of a
registration statement to be filed with the SEC. WilTel shareholders are urged
to carefully read the registration statement and the prospectus included
therein, and the Schedule TO and other documents relating to an offer, when they
become available because these documents will contain important information
relating to the offer. You may obtain a free copy of these documents after they
have been filed with the SEC, and other documents filed by Leucadia with the
SEC, at the SEC's website at www.sec.gov. Once a registration statement, as well
as any documents incorporated by reference therein and a Schedule TO have been
filed with the SEC, you will also be able to inspect and copy these documents at
the public reference room maintained by the SEC at 450 Fifth Street, NW,
Washington, D.C. 20549. YOU SHOULD CAREFULLY READ THE PROSPECTUS AND THE TENDER
OFFER STATEMENT ON SCHEDULE TO WHEN THEY BECOME AVAILABLE BEFORE MAKING A
DECISION CONCERNING AN OFFER


Item 7.    Material to be Filed as Exhibits.
           --------------------------------

           1. Agreement among the Beneficial Owners with respect to the filing
of this Amendment No. 4.

           2. Letter dated August 7, 2003, from Leucadia National Corporation to
the Independent Company Directors of WilTel Communications Group, Inc.

           3. Press release of Leucadia National Corporation dated August 7,
2003.



                                       5

                                    SIGNATURE

           After reasonable inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true, complete and
correct.

    Dated:  August 7, 2003

                           LUK ACQUISITION I, LLC


                           By:/s/ Joseph A. Orlando
                              --------------------------------------------------
                              Name: Joseph A. Orlando
                              Title: President

                           LUK ACQUISITION II, LLC


                           By:/s/ Joseph A. Orlando
                              --------------------------------------------------
                              Name: Joseph A. Orlando
                              Title: President

                           LEUCADIA NATIONAL CORPORATION


                           By: /s/ Joseph A. Orlando
                               -------------------------------------------------
                               Name: Joseph A. Orlando
                               Title: Vice President and Chief Financial Officer




                                       6

                                  EXHIBIT INDEX
                                  -------------

Exhibit No.
-----------

Exhibit 1           Agreement among the Beneficial Owners with respect to the
                    filing of this Amendment No. 4.

Exhibit 2           Letter dated August 7, 2003, from Leucadia National
                    Corporation to the Independent Company Directors of WilTel
                    Communications Group, Inc.

Exhibit 3           Press release of Leucadia National Corporation dated August
                    7, 2003.





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