Two men arrested after reports of a “suspicious device” in a passenger plane’s toilet have been released without charge.
RAF jets were scrambled to intercept the Ryanair plane and escorted it to Stansted at about 19:00 BST on Sunday.
Counter-terror officers detained two men, but after investigating they discovered the object in the toilet was a mobile phone.
The men are not considered to have committed any offences, police said.
A Ryanair spokesman said the crew of the flight from Vienna to Stansted had been alerted to a “potential security threat on board”.
Typhoon jets from RAF Coningsby intercepted the plane and escorted it to the Essex airport.
The Eastern Region Special Operations Unit said the men were detained under Schedule 7 of the Terrorism Act.
But in a new statement on Monday the unit said: “After examination by specialist investigators, the object was found not to be of concern.