COMOX VALLEY, British Columbia -- A Korean Airlines flight out of Vancouver, Canada, requested U.S. assistance in reaction to a "credible bomb threat" on board, a U.S. official told Fox News.

The U.S. military scrambled two F-15 fighter jets, and the aircraft landed safely with the US military escort at a Canadian military base on Vancouver Island.

Officials are checking now for explosives.

The Canadian Forces says in a news release the flight was traveling from Vancouver International Airport and was diverted at about 5:30 p.m. The military says emergency personnel are securing the aircraft in accordance with normal procedures.

Fox News' Justin Fishel and The Associated Press contributed to this report.