GRAND FORKS, N.D. - A University of North Dakota research jet with four people on board made a successful emergency landing after the engines quit, the university said.

The National Transportation Safety Board is investigating Friday's incident near Fairbanks, Alaska, UND said.

The Citation II research jet from the university's Atmospheric Science Department was lost from radar contact during a study of icing conditions, according to a release from UND.

When the department's chief research pilot, Paul Le Hardy, was unable to restart the engines, he maneuvered the jet into a successful emergency landing about 70 miles north of Fairbanks.

UND spokesman Peter Johnson said two other occupants are researchers with UND. The fourth person on board is a researcher with Sikorsky, a company that designs helicopters.

"Given the weather conditions and the formidable terrain in Alaska, the safe landing of the aircraft without injury to the crew was a remarkable display of airmanship on the part of the pilot," said Dr. Bruce Smith, Dean of UND's John D. Odegard School of Aerospace Sciences.