SEATTLE (AP) - Alaska Airlines says there was an "unauthorized take-off" of an airplane and witnesses reported a jet being chased by military planes near Sea-Tac International Airport in Washington state.
The airline tells The Associated Press that the plane was a Horizon Air Q400 and it believed no passengers were on board.
No other information was immediately available.
Horizon Air is part of Alaska Air Group and flies shorter routes throughout the U.S. West.
The Q400 ix a turboprop aircraft with 76 seats.