A plane was evacuated after someone sent a photograph of a suicide vest to passengers and hostesses on board.
The unknown sender used Apple's AirDrop feature, which allows users to easily and anonymously transfer files to other iOS devices via Bluetooth.
Authorities say the plane bound for Florida was about to take off from the Newark Liberty International Airport in New Jersey when the image was widely shared on board.
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A crew member on JetBlue flight 573 alerted the captain, who informed the authorities about 7.45 a.m. of Saturday.
The plane returned to the gate and the 150 people on board were asked to leave the aircraft, and the police again inspected and examined the K-9 dogs that sniffed bombs.
"We went to the door and then we walked away and the captain came up and said there had been a security threat," Thomas Desmond told NBC News.
"I was nervous when you see the Port Authority police officers getting on your plane and you have no idea what's going on."
The culprit was probably one of those on board, since AirDrop only works with those who are close to the sender. However, they were not tracked.
JetBlue said that the additional security control was carried out due to "a large amount of caution".
Finally, the flight left just before 11.30 am, with no side effects on other flights leaving or arriving in Newark.