Typhoon jets escorted a Ryanair flight to a UK airport after a mobile phone sparked a bogus terror alert.
A 34-year-old man from Kuwait and a 48-year-old man from Italy were arrested after the "suspicious item" was discovered in a plane toilet.
But they were later released without charge after the device turned out to be a simple mobile.
Two RAF fighter planes had been scrambled to intercept the flight en route from Vienna on Sunday.
A spokesman for the Eastern Region Special Operations Unit confirmed the object was a mobile phone and "not of concern".
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The Unit's counter-terror head, DS Andy Waldie, said: "We understandably take any reports of suspicious objects or behaviour on flights very seriously and thankfully on this occasion there was no cause for concern.
"I'd like to thank those on the flight for their co-operation and understanding while officers conducted their inquiries."
The Typhoon jets took off from RAF Coningsby in Lincolnshire after the terror alert was sounded.
The men were questioned after the aircraft touched down at London Stansted.
A Ryanair spokesman said the crew of the flight from Vienna to the Essex airport had been alerted to a "potential security threat on board".
He added: "In line with procedures, the captain informed UK authorities and continued to London Stansted, where the aircraft landed normally and taxied to a remote stand where passengers disembarked safely.
"Passengers in London Stansted waiting to depart to Vienna were transferred to a spare aircraft to minimise the delay to their flight."
