NEWS

                               (ONEOK LETTERHEAD)
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ANALYST CONTACT: DAN HARRISON                    ANALYST CONTACT: ELLEN KONSDORF
918-588-7950                                     877-208-7318
MEDIA CONTACT: MEGAN WASHBOURNE                  MEDIA CONTACT: BETH JENSEN
918-588-7572                                     402-492-3400

                       ONEOK AND NORTHERN BORDER PARTNERS
                        TO PRESENT AT AGA FINANCIAL FORUM

     TULSA, Okla. -- April 24, 2006 -- ONEOK, Inc. (NYSE:OKE) and Northern
Border Partners, L. P. (NYSE: NBP) will present at the American Gas Association
Financial Forum in Scottsdale, Ariz., on Monday, May 8, 2006, beginning at 12:00
p.m. Mountain Standard Time (3:00 p.m. Eastern Daylight Time, 2:00 p.m. Central
Daylight Time).

     Participants include: David Kyle, ONEOK chairman, president and chief
executive officer, who is also chairman and CEO of the partnership; Jim Kneale,
ONEOK executive vice president, finance and administration and chief financial
officer, who is also CFO of the partnership and; John W. Gibson, partnership
president and chief operating officer.

     The presentation will be webcast -- with slides and audio -- on the ONEOK
and Northern Border Partners Web sites at www.oneok.com and
www.northernborderpartners.com. A replay of the webcast will be archived for 90
days.

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ONEOK, Inc. (NYSE: OKE) is a diversified energy company. We are the general
partner and own 45.7 percent of Northern Border Partners, L.P. (NYSE:NBP), one
of the largest publicly-traded limited partnerships, which is a leader in the
gathering, processing, storage and transportation of natural gas in the U.S. and
owns one of the nation's premier natural gas liquids (NGL) systems, connecting
much of the natural gas and NGL supply in the mid-continent with key market
centers. ONEOK is among the largest natural gas distributors in the United
States, serving more than 2 million customers in Oklahoma, Kansas and Texas. Our
energy services operation focuses primarily on marketing natural gas and related
services throughout the U.S. ONEOK is a Fortune 500 company.

For information about ONEOK, Inc. visit the Web site: www.oneok.com.

Northern Border Partners, L.P. is a publicly traded partnership whose purpose is
to own, operate and acquire a diversified portfolio of energy assets. The
Partnership owns and manages natural gas gathering, processing, storage,
interstate and intrastate natural gas pipeline assets and one of the nation's
premier natural gas liquids (NGL) systems, connecting much of the natural gas
and NGL supply in the mid-continent with key market centers. More information
can be found at www.northernborderpartners.com.

Some of the statements contained and incorporated in this press release are
forward-looking statements within the meaning of the Private Securities
Litigation Reform Act of 1995. The forward-looking statements relate to:
anticipated financial performance; management's plans and objectives for future
operations; business prospects; outcome of regulatory and legal proceedings;
market conditions and other matters. The Private Securities Litigation Reform
Act of 1995 provides a safe harbor for forward-looking statements in certain
circumstances.



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