TORONTO (AP) — A Korean Airlines Boeing 777 en route from Vancouver to Seoul was diverted to a nearby Canadian military base after the airline’s U. S. call center received a bomb threat.

Authorities continued to search the aircraft early today and the Royal Canadian Mounted Police said nothing suspicious had yet been found.

Korean Airlines said in a statement that the call center received the threat Tuesday about 25 minutes after takeoff from Vancouver International Airport. Airline officials said the aircraft with 149 passengers then turned around.

Maj. Holly Apostoliuk, a Canadian spokeswoman for the North American Aerospace Defense Command, said two U.S. F-15 fighter jets from Portland, Ore., escorted the plane to Canada’s Comox air base on Vancouver Island, 113 miles outside Vancouver.

The passengers and crew stayed overnight in the area while officials did a detailed search of the plane’s luggage today, RCMP Inspector Byron Massie said.

Massie said nothing suspicious had yet been found.

Massie said the same Korean Airlines flight out of Vancouver faced a similar threat Monday and the all-clear was given after a two-hour search.