Pilots and passengers reporting a disruption at @SeaTacAirport — tweets discussing an unauthorized pilot in the air. No official confirmation of anything. #aviation
Apparent @SeaTacAirport groundstop.
From a passenger who was on an @AlaskaAir flight that returned to @SeaTacAirport gate:
Confirmed by @SeaTacAirport sources there is an "airspace issue."
Multiple sources say an aircraft was "stolen" from @SeaTacAirport and remains airborne nearby.
-@SeaTacAirport ground stop has ended.
Eastbound and southbound traffic released for departures from @SeaTacAirport.
Additional info from a @KIRO7Seattle reporter:
Update: #aviation @SeaTacAirport
Reported impact site SW of @SeaTacAirport. 
Further indication the stolen plane has crashed: #aviation @SeaTacAirport
Apparent video of the stolen aircraft:
Aviation journalist @jonostrower with a bit more info on the Horizon Air plane: #aviation @SeaTacAirport
Official confirmation of some of the info from @AlaskaAir:
Here's a photo of a typical @Bombardier Q400 which can carry 90 passengers.
Live coverage now from @KING5Seattle which had an eyewitness on air who saw the plane pass by and heard explosion. king5.com/live-video
The plane crash was "definitely on Ketron island," according to one of the journalists in the @KING5Seattle studio, quoting a source.
More official confirmation that a @SeaTacAirport employee took off in the aircraft which has crashed.
Rogue pilot apparently was a mechanic, according to police.
Another screen grab of a video clip of the @Bombardier Q400 shortly before it crashed, aired by @KING5Seattle.
Prior to the crash when I was monitoring @SeaTacAirport ATC I heard the tower talking with "Rick" who said he wanted to do barrel rolls, then indicated one of his engines was apparently going out and was advised to stay over water.
We also now can confirm two F-15 jets were scrambled in response, apparently from the Oregon Air National Guard.
Audio via @jonostrower:
Police describe the rogue pilot as a 29-year-old "suicidal male."
“The guy didn’t know how to fly or intentionally did stunts over Anderson island, and crashed into Ketron Island,” according to @PierceSheriff spokesman Ed Troyer. bellinghamherald.com/news/state/was…
"This is not a terrorist incident," tweets @PierceSheriff.
Sheriff says military jets responded and kept the stolen plane from crashing in a populated area.
Man who took plane on “suicidal” flight said to be an employee who helped direct aircraft to gates and de-iced planes. m.seattlepi.com/news/crime/art…
