Alaska Airlines confirmed the aircraft belonged to its subsidiary Horizon Air and was a Bombardier Dash-8 (Q-400) turboprop aircraft that likely had no passengers on board.
F-16 jets were reportedly dispatched in pursuit of the aircraft. In audio obtained from that conversation, the man - referred to as "Rich" in the transmission - is heard saying: "I've got a lot of people that care about me".
The incident was not considered terrorism, the FBI's Seattle office tweeted. PCSO tweeted that he "was doing stunts in air or lack of flying skills caused crash into Island".
It reported that the plane was stolen by a mechanic.
The Horizon Air Q400 plane of Alaska Airlines was taken by an employee from the airport which resulted in interruption of air traffic at the airport.
When one of the F-15s made contact with the rogue pilot, the plane nose dived and crashed, a source at Joint Base Lewis-McChord Air Force Base told KOMO.
The sheriff's office also said that the F-15s, which were scrambled out of Portland, in the nearby state of OR, arrived minutes after the plane was stolen and kept the aircraft "out of harms way and people on ground safe".
"I think I am going to try to do a barrel roll and if that goes well then I am going to go nose down and call it a night". "I'm a broken guy who had a few screws loose".
"Stolen horizon airplane crashed into Ketron island".
Authorities initially identified the man as a mechanic but later said he was a ground service agent, a job that includes directing aircraft for takeoff and gate approach, and de-icing planes. "I don't know what the burnage is like on takeoff, but it burned quite a bit faster than I expected". "The remnants from the flames from the fire that was started when the plane crashed". "Never really knew it until now". As of 12:30 a.m., SeaTac tweeted that normal operations had resumed.
'It was unfathomable, it was something out of a movie, ' he told the newspaper. Everyone was so confused as to what was going on, because the plane was so low that the Alaska Airlines logo was totally visible.
Fighter pilots from the Air National Guard of Washington and OR flew alongside the plane, according to an emailed statement from Gov. Jay Inslee.