An airline employee hijacked a passenger plane at a Seattle airport made “an unauthorised take-off”.

All flights were grounded at Seattle airport after it was revealed that a passenger plane belonging to Horizon Air took off without permission, BBC reported.

According to preliminary reports, a plane with no passengers on board crashed into the sea. It was escorted by fighters.

The identity and condition of the pilot are not known.

Some dude stole a plane from #Seatac (Allegedly), did a loop-the-loop, ALMOST crashed into #ChambersBay, then crossed in front of our party, chased by fighter jets and subsequently crashed. Weird times. pic.twitter.com/Ra4LcIhwfU

— bmbdgty (@drbmbdgty) August 11, 2018