EXHIBIT 99
                                                                   PRESS RELEASE

 MDU RESOURCES RELEASES DETAILS ON SOUTH TEXAS PRODUCTION ASSET ACQUISITION AND
                INCREASES LONG-TERM COMPOUND ANNUAL GROWTH GOALS

BISMARCK, N.D. - APRIL 29, 2005 - MDU Resources Group, Inc. (NYSE:MDU) released
additional details on its proposed acquisition of producing property assets in
south Texas today, saying the estimated cost of the 79 billion cubic feet
equivalent of proved reserves included in the recently signed purchase and sale
agreements is approximately $1.85 per thousand cubic feet equivalent (Mcfe).
This purchase price includes gas equivalency value for all proven gas, oil
(condensate) and gas liquids determined to be "proven" according to normal
industry engineering standards. The reserves are considered long-term reserves
and have normal declines that would represent, on average, wells having a 10 to
13 year life. However, the company believes that the true long-term value over
and above the acquisition price being paid for the proven reserves is in the
unexploited, unbooked and otherwise unrealized behind pipe potential and the
multi-zone nature of the shallow and deeper zones within the existing fields so
prominent in the south Texas region.

In addition, the company is increasing its guidance for long-term compound
annual growth goals on earnings per share from operations to 7 percent to 10
percent from the previously released guidance of 6 percent to 9 percent.

The acquisition, being completed through its indirect wholly owned subsidiary,
Fidelity Exploration & Production Company (Fidelity), involves the purchase of
natural gas and oil properties from a Houston-based independent producer for an
aggregate cash purchase price of $145 million, subject to accounting and
purchase price adjustments customary for acquisitions of this type.

The acquired reserves are similar to the reserves and production coming from the
company's non-operated interests in other parts of onshore Texas and Louisiana
as well as the Rocky Mountain region. The company has held interests in
producing properties in Texas since the late 1980s and is familiar with reserve
life and production characteristics in the area. The properties being acquired
are located in south Texas with primary production from the Frio and Vicksburg
formations. Current production from properties being acquired averages 23,000 to
28,000 Mcfe per day. Based on its evaluation, the company believes there is
additional exploitation potential for these properties, which currently produce
natural gas, natural gas liquids and some oil. The seller will continue to
operate one of the production fields, and Fidelity will operate the rest of the
acquired properties.

Additionally, company officials reiterated that funds for the acquisition are
expected to be provided from a combination of cash on hand and available debt
capacity and no equity will be issued to finance the acquisition. Following
completion of the acquisition, the company expects to stay within its goal of
keeping debt at its non-regulated businesses at no more than 40 percent of total
capitalization and anticipates that the acquisition will be accretive to
earnings per share and cash flow.





The acquisition is expected to close in May 2005, conditional upon completion of
a due diligence process, including environmental reviews, and satisfaction of
other standard closing conditions.

In addition to the information on the acquisition, the company increased its
long-term compound annual growth goals on earnings per share from operations to
7 percent to 10 percent from its previously published range of 6 percent to 9
percent. "The senior management team, at a recent strategic planning meeting,
decided to raise its target growth goals because of the expected strong outlook
for all our business lines," said Martin A. White, chairman of the board,
president and chief executive officer of MDU Resources.

The information in this release includes certain forward-looking statements
within the meaning of Section 21E of the Securities Exchange Act of 1934. The
forward-looking statements contained in this release, including those with
respect to additional exploitation potential, anticipated debt levels and
long-term compound annual growth goals on earnings per share from operations are
expressed in good faith and are believed by the company to have a reasonable
basis. Nonetheless, actual results may differ materially from the projected
results expressed in the forward-looking statements. Following are important
factors that could cause actual results or outcomes for the company to differ
materially from those discussed in forward-looking statements.
     o    The company's natural gas and oil production and pipeline and energy
          services businesses are dependent on factors, including commodity
          prices and commodity price basis differentials, which cannot be
          predicted or controlled.
     o    The construction and operation of power generation facilities may
          involve unanticipated changes or delays that could negatively impact
          the company's business and its results of operations.
     o    The company's utility services segment operates in highly competitive
          markets characterized by low margins in a number of service lines and
          geographic areas. This segment's ability to return to profitability on
          a sustained basis will depend upon improved capital spending for
          electric construction services and management's ability to
          successfully refocus the business on more profitable markets, reduce
          operating costs and implement process improvements in project
          management.
     o    Economic volatility affects the company's operations as well as the
          demand for its products and services and, as a result, may have a
          negative impact on the company's future revenues.
     o    The company relies on financing sources and capital markets. If the
          company is unable to obtain financing in the future, the company's
          ability to execute its business plans, make capital expenditures or
          pursue acquisitions that the company may otherwise rely on for future
          growth could be impaired.
     o    Some of the company's operations are subject to extensive
          environmental laws and regulations that may increase costs of
          operations, impact or limit business plans, or expose the company to
          environmental liabilities. One of the company's subsidiaries is
          subject to litigation in connection with its coalbed natural gas
          development activities. The ultimate outcome of the actions could have
          a material effect on existing coalbed natural gas operations and/or
          the future development of its coalbed natural gas properties.
     o    The company is subject to extensive government regulations that may
          delay and/or have a negative impact on its business and its results of
          operations.
     o    The value of the company's investments in foreign operations may
          diminish due to political, regulatory and economic conditions and
          changes in currency exchange rates in countries where the company does
          business.
     o    The pending sale of the Termoceara generating facility may impact the
          company's future earnings. The company has signed a term sheet that
          provides a framework in principle for the sale of the Termoceara
          generating facility to Petrobras. As a result of the sale, the company
          will no longer generate earnings from the project, and there can be no


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          assurance that the company will be able to use the proceeds from the
          sale in a manner that will provide comparable future earnings.
     o    Competition is increasing in all of the company's businesses.
     o    Weather conditions can adversely affect the company's operations and
          revenues.
     o    Other factors that could cause actual results or outcomes for the
          company to differ materially from those discussed in forward-looking
          statements include:
          o    Acquisition, disposal and impairment of assets or facilities
          o    Changes in operation, performance and construction of plant
               facilities or other assets
          o    Changes in present or prospective generation
          o    The availability of economic expansion or development
               opportunities
          o    Population growth rates and demographic patterns
          o    Market demand for, and/or available supplies of, energy products
               and services
          o    Cyclical nature of large construction projects at certain
               operations
          o    Changes in tax rates or policies
          o    Unanticipated project delays or changes in project costs
          o    Unanticipated changes in operating expenses or capital
               expenditures
          o    Labor negotiations or disputes
          o    Inability of the various contract counterparties to meet their
               contractual obligations
          o    Changes in accounting principles and/or the application of such
               principles to the company
          o    Changes in technology
          o    Changes in legal or regulatory proceedings
          o    The ability to effectively integrate the operations of acquired
               companies

For a further discussion of these risk factors and cautionary statements, refer
to the Introduction and to Item 7 - Management's Discussion and Analysis of
Financial Condition and Results of Operations - Risk Factors and Cautionary
Statements that May Affect Future Results of the company's most recent Form
10-K.

MDU Resources Group, Inc., a member of the S&P MidCap 400 index, provides
value-added natural resource products and related services that are essential to
energy and transportation infrastructure. MDU Resources includes natural gas and
oil production, construction materials and mining, domestic and international
independent power production, electric and natural gas utilities, natural gas
pipelines and energy services, and utility services. For more information about

MDU Resources, see the company's Web site at www.mdu.com or contact the investor
relations department at investor@mduresources.com.


                                 * * * * * * * *
Contacts:

         For analyst inquiries, contact:
         Warren Robinson, Executive Vice President and Chief Financial Officer
         (701) 222-7991

         For media inquiries, contact:
         Tim Rasmussen, Public Relations Manager
         (701) 222-7770


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