Passengers delayed more than 3 hours after captain reports security threat on plane at Sea-Tac

SEATTLE -- A flight from Seattle to Denver was delayed Thursday because of a security threat on board the plane, Port of Seattle officials said.

Few details were immediately available, but officials with Southwest Airlines said the captain in command of flight 3677 reported a potential security threat to authorities.

"The aircraft was taxied to a remote part of the airport where customers and luggage are being re-screened," a Southwest Airlines official said.

According to, the flight was scheduled to depart Sea-Tac at 11:35 a.m. It departed at 3:02 p.m.

The plane eventually returned to the gate. The plane originally had 134 passengers and five crew members on board, but officials said the plane headed to Denver with 128 passengers.

Stay with Q13 FOX News for updates on this developing story.