MDU Resources to Present at the American Gas Association Financial Forum

Business Wire, April 29, 2008

BISMARCK, N.D. -- MDU Resources Group, Inc. (NYSE:MDU) will webcast its presentation to the financial community Monday, May 5, at the 2008 American Gas Association Financial Forum. MDU Resources' President and Chief Executive Officer Terry D. Hildestad and Executive Vice President, Treasurer and Chief Financial Officer Vernon A. Raile will present a strategic and financial overview.

The webcast will begin at 9:45 a.m. EDT and can be accessed at www.mdu.com. A webcast replay will be available.

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. The company operates in three core lines of business: energy, construction materials and utility resources. MDU Resources includes natural gas and oil production, natural gas pipelines and energy services, construction materials and contracting, construction services, and electric and natural gas utilities. 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.