Update at 9:55 p.m.: The Southwest Airlines flight landed at the Denver International Airport at 6:45 p.m., about four hours later than its scheduled arrival.
Port of Seattle police did not have any additional information on Thursday night about the passenger who was detained.
Update at 4:02 p.m.: The security threat involved a passenger on the flight, who was questioned by Port of Seattle police and the FBI. He has been detained.
Additional details on the threat were not immediately available.
Original post: Officials with Sea-Tac Airport say that a Southwest Airlines flight to Denver was delayed Thursday afternoon due to “a security situation.” Airport officials did not immediately offer specifics.
Peter McGraw, spokesman for the Port of Seattle, said that “Port of Seattle Police and airport personnel responded to a security situation on the aircraft.”
Flight 3677 was slated to leave Sea-Tac at 11:35 a.m. and was still on the ground at 3:15 p.m. Passengers were removed from the plane and and underwent another security screening, said Dan Landson, spokesman for Southwest Airlines.
In a news release, Southwest Airlines said that shortly after pushing back from the gate the captain “notified authorities of a potential security threat onboard the aircraft.”
“The aircraft was taxied to a remote part of the airport where Customers and luggage are being rescreened. We are working with appropriate authorities to ensure the safety of everyone onboard.,” the statement said.