8-K

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                                    FORM 8-K



                       SECURITIES AND EXCHANGE COMMISSION

                              Washington, DC 20549



                                 CURRENT REPORT



                         Pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934



          Date of Report (date of earliest event Reported) June 2, 2000
                                                          --------------



                              COLUMBIA ENERGY GROUP
                              ---------------------
             (Exact name of registrant as specified in its charter)


             Delaware                       1-1098              13--1594808
    ----------------------------          ------------         -------------
    (State or other jurisdiction          (Commission          (IRS Employer
        of incorporation)                 File Number)       Identification No.)


                13880 Dulles Corner Lane, Herndon, VA 20171-4600
                ------------------------------------------------
                    (Address of principal executive offices)


        Registrant's telephone number, including area code (703) 561-6000
                                                           --------------


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Item 5. Other Events

         Information contained in a News Release dated June 2, 2000 is
incorporated herein by reference.


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                                    SIGNATURE

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                             Columbia Energy Group
                                             ---------------------
                                                 (Registrant)


                                             By /s/J. W. Grossman
                                               -------------------
                                               Vice President & Controller

Date: June 2, 2000

EX-99

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FOR IMMEDIATE RELEASE                                                  Contacts:
June 2, 2000                                     Michael J. McGarry (News Media)
                                                                    703/561-6063
                                     Melissa E. Bockelmann (Financial Community)
                                                                    703/561-6011


COLUMBIA ENERGY GROUP SHAREHOLDERS APPROVE MERGER WITH NISOURCE

         WILMINGTON, Del., June 2, 2000 - Columbia Energy Group today announced
that its shareholders have voted overwhelmingly to approve the company's merger
with NiSource Inc., an Indiana-based energy company. NiSource's shareholders
already had approved the merger at its annual meeting, held yesterday in
Columbus, Ohio.

          Columbia and NiSource announced on Feb. 28, 2000 that they had entered
into a definitive merger agreement, pending shareholder and regulatory approval.
More than 66 percent of Columbia shares were voted in favor of the merger,
representing a 98 percent approval of the merger. Following regulatory approval
and closing of the transaction, Columbia shareholders will receive approximately
$6 billion in cash and stock, with another $2.5 billion in Columbia debt to be
assumed by a new NiSource holding company.

         "We are very pleased with today's outcome, which is an important
milestone in the merger of our two companies," said Oliver G. Richard III,
president, chairman and CEO of Columbia Energy Group. "The new company will be
an energy powerhouse, the largest natural gas distributor east of the Rocky
Mountains, serving some 4.1 million customers in nine states. It will have a
dynamic platform for growth in an industry that's undergoing dramatic changes,"
he said. "Shareholders and employees also will have an opportunity to share in
the future growth of the new company.

         "Columbia and NiSource managements are working together to achieve a
seamless transition and integration of the companies after the transaction's
closing date," Richard added. He said they already have made various filings
with appropriate state and federal regulatory agencies. The merger is expected
to be completed by the end of 2000, with the exact date dependent upon receipt
of regulatory approval.

         Under the merger agreement, Columbia Energy Group shareholders will
 receive, for each Columbia share of common stock, $70 in cash plus a $2.60 face
 value SAILSSM (a unit consisting of a zero coupon debt security with a forward
 equity contract). Columbia shareholders also have the option to elect to
 receive (in lieu of cash and SAILS) new holding company stock in a tax-free
 exchange, for up to 30 percent of the outstanding Columbia shares, subject to
 certain conditions.

         Approximately 45 days before the expected merger date, Columbia
shareholders will be sent information about their choice between cash and new
holding company SAILS or new holding company common shares.


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                                    - more -

         Columbia Energy Group, based in Herndon, Va., is one of the nation's
leading energy services companies, with assets of approximately $7 billion. Its
operating companies currently engage in nearly all phases of the natural gas
business, including exploration and production, transmission, storage and
distribution, as well as retail energy marketing, propane and petroleum product
sales, and electric power generation. Information about Columbia Energy Group
(NYSE:CG) is available on the Internet at www.columbiaenergygroup.com.

This release contains forward-looking statements within the meaning of the
federal securities laws. These forward-looking statements are subject to various
risks and uncertainties. The factors that could cause actual results to differ
materially from the projections, forecasts, estimates and expectations discussed
herein may include factors that are beyond the company's ability to control or
estimate precisely, such as estimates of future market conditions, the behavior
of other market participants and the actions of the Federal and State
regulators.

Other factors include, but are not limited to, actions in the financial markets,
weather conditions, economic conditions in the two companies, service
territories, fluctuations in energy-related commodity prices, conversion
activity, other marketing efforts and other uncertainties. These and other risk
factors are detailed from time to time in the two companies, SEC reports.
Readers are cautioned not to place undue reliance on these forward-looking
statements, which speak only as of the date of this release. The companies do
not undertake any obligation to publicly release any revisions to these
forward-looking statements to reflect events or circumstances after the date of
the document.

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