FILED BY KERR-MCGEE CORPORATION
                                                  PURSUANT TO RULE 425 UNDER THE
                                         SECURITIES ACT OF 1933 AND DEEMED FILED
                                               PURSUANT TO RULE 14A-12 UNDER THE
                                                 SECURITIES EXCHANGE ACT OF 1934

                                      SUBJECT COMPANY:  WESTPORT RESOURCES CORP.
                                              SECURITIES ACT FILE NO. 333-114886





The  communication  filed herewith is a news release made in connection with the
proposed merger of Kerr-McGee Corporation and Westport Resources Corporation.


                               Joint News Release

Kerr-McGee Corporation                            Westport Resources Corporation


                     SEC Declares Registration Statement for
                     ---------------------------------------
                    Kerr-McGee and Westport Merger Effective
                    ----------------------------------------

     Oklahoma  City  and  Denver,  May 21,  2004 - On May  21,  2004,  the  U.S.
Securities and Exchange  Commission  (SEC) declared  effective the  registration
statement on Form S-4 filed by Kerr-McGee Corp. (NYSE: KMG), with respect to the
merger with Westport  Resources  Corporation (NYSE: WRC). The U.S. Federal Trade
Commission  previously  granted early termination of the waiting period required
by the Hart-Scott-Rodino Antitrust Improvements Act of 1976.
     Kerr-McGee and Westport stockholders of record as of May 20, 2004 are being
mailed  a  joint  proxy  statement/prospectus  for  special  meetings  of  their
respective  stockholders,  to be held by each  company  on  June  25,  2004,  in
connection with the transaction.  The Kerr-McGee special meeting of stockholders
is scheduled for 10 a.m. Central Daylight Time in the Robert S. Kerr Auditorium,
Kerr-McGee  Center,  123 Robert S. Kerr,  Oklahoma  City.  The Westport  special
meeting of stockholders will be at 9 a.m. Mountain Daylight Time in the Bluebell
I Room at the Pinnacle Club, 555 17th Street, 37th floor, Denver. Kerr-McGee and
Westport expect to close the merger promptly  following  receipt of approvals by
their respective stockholders.
     Kerr-McGee and Westport  announced on April 7 that their respective  boards
of directors had unanimously approved a strategic merger valued at approximately
$3.4 billion.  The merged  company will be known as Kerr-McGee  Corporation  and
will be headquartered in Oklahoma City.
     Under the terms of the merger agreement, Westport stockholders will receive
0.71 shares of  Kerr-McGee  common stock for each common share of Westport.  The
transaction is expected to be non-taxable to the stockholders of both companies.
In addition, prior to consummation of the transaction,  Westport will redeem all
of its 6 1/2%  Convertible  Preferred Stock at a redemption  price of $25.65 per
share.
     Kerr-McGee is an Oklahoma  City-based energy and inorganic chemical company
with  worldwide   operations  and  assets  of  approximately  $10  billion.  For
additional information about Kerr-McGee, see www.kerr-mcgee.com.
     Westport is an independent  energy  company  engaged in oil and natural gas
exploitation,  acquisition  and  exploration  activities  primarily in the Rocky
Mountains, Permian Basin/Mid-Continent,  Gulf Coast and offshore Gulf of Mexico.
For additional information about Westport, see www.westportresourcescorp.com.


                           IMPORTANT LEGAL INFORMATION

THIS  NEWS  RELEASE  IS NOT AN  OFFER  TO  SELL  THE  SECURITIES  OF  KERR-MCGEE
CORPORATION AND IT IS NOT SOLICITING AN OFFER TO BUY THESE SECURITIES.

INVESTORS  AND  SECURITY  HOLDERS ARE URGED TO READ THE  DEFINITIVE  JOINT PROXY
STATEMENT/PROSPECTUS  REGARDING  THE  PROPOSED  TRANSACTION  BECAUSE IT CONTAINS
IMPORTANT INFORMATION.

     Kerr-McGee  Corporation  has filed a  Registration  Statement on Form S-4/A
with the U.S.  Securities and Exchange  Commission (SEC) containing a definitive
joint proxy  statement/prospectus  regarding  the proposed  transaction  between
Kerr-McGee  Corporation  and  Westport  Resources  Corporation.   Investors  and
security  holders  may  obtain  a  free  copy  of  the  definitive  joint  proxy
statement/prospectus  and other  documents  filed or furnished by  Kerr-McGee or
Westport  with  the  SEC  at  the  SEC's  website,  www.sec.gov.  Copies  of the
definitive  joint  proxy  statement/prospectus  and  other  documents  filed  or
furnished by Kerr-McGee or Westport may also be obtained for free by directing a
request to Kerr-McGee  Corporation,  Attn: Corporate Secretary,  P.O. Box 25861,
Oklahoma  City,  Oklahoma  73125 or to  Westport  Resources  Corporation,  Attn:
Investor Relations, 1670 Broadway, Suite 2800, Denver, Colorado 80202.
     Kerr-McGee,  Westport and their  respective  directors  and officers may be
deemed to be  participants  in the  solicitation  of proxies with respect to the
proposed transaction  involving Kerr-McGee and Westport.  Information  regarding
Kerr-McGee's and Westport's  respective directors and officers and a description
of their direct and indirect  interests,  by security holdings or otherwise,  is
available in the definitive  joint proxy  statement/prospectus  contained in the
above referenced  Registration Statement on Form S-4/A filed with the SEC on May
18, 2004.

Safe Harbor Language on Forward Looking Statements:

     Statements in this news release  regarding  the  company's or  management's
intentions,  beliefs or expectations,  or that otherwise speak to future events,
including  closing time frame and  stockholder  approval,  are  "forward-looking
statements" within the meaning of the U.S. Private Securities  Litigation Reform
Act of 1995. These forward-looking  statements include those statements preceded
by, followed by or that otherwise include the word "expect" or similar words.
     Matters discussed in these statements involve risks and uncertainties which
may cause results to differ materially from those set forth in these statements.
The following factors,  among others,  could cause actual results to differ from
those set forth in these forward-looking  statements: the failure to receive the
requisite approval of Kerr-McGee or Westport stockholders in connection with the
merger; the accuracy of the assumptions that underlie the statements, changes in
laws and regulations, and other factors and risks identified in the Risk Factors
sections of the  definitive  joint proxy  statement/prospectus  contained in the
Registration  Statement on Form S-4A filed by Kerr-McGee with the SEC on May 18,
2004,  Kerr-McGee's  Annual Report on Form 10-K and Westport's  Annual Report on
Form 10-K as well as other of their SEC filings.

                                      # # #

CONTACTS:         Kerr-McGee Corp.                Westport Resources Corporation

       Media      Debbie Schramm                  Jonathan Bloomfield
                  Direct - 405-270-2877           Direct - 303-575-0111
                  Pager - 888-734-8294
                  dschramm@kmg.com

       Investors  Rick Buterbaugh                 Jonathan Bloomfield
                  Direct - 405-270-3561           Direct - 303-575-0111