Irish police have arrested a 19-year-old German man in connection with a bomb scare which forced a Delta airlines plane to make an emergency landing in Ireland on Sunday.
The US plane was searched thoroughly on Sunday night
They did not release his name, but confirmed that he was a passenger.
The plane was on its way from Germany to the US when a note warning of a bomb on board was found in its toilet.
The 147 passengers and crew were taken off the plane and extensive searches carried out, but nothing was found.
Police interviewed and fingerprinted all the passengers and crew in a bid to identify the hoaxer. They also took samples of their handwriting.
oman said the German passenger was arrested on Monday, but had not been charged.
Delta said the remaining passengers would be flown to Atlanta later in the day.
The bomb note in the Boeing 767-300 jet was discovered two hours after the plane took of from Frankfurt.
The plane landed at Shannon airport in western Ireland, and taxied to a remote part of the airport.
Police and army bomb disposal experts waited until the scheduled arrival time in Atlanta before boarding.
"Nothing suspicious was found," said a spokesman for the Garda, Ireland's national police force.
"It has now been declared safe and will be taking off later in the day."
The passengers were taken to hotels in Shannon to spend the night after their interviews.