A suspicious object which led to the closure of London Luton Airport had "power sources" and a "large amount of organic mass", the airport has said.
More than 1,500 passengers were evacuated from the airport on Monday afternoon after the rectangular item was spotted during an X-ray.
The airport said the item was discovered in a bag which had been left unattended.
Bedfordshire Police said the item was destroyed. No arrests were made.
Forty six commercial flights were cancelled as a result of the closure, with a further 18 flights diverted.
Flight board at Luton Airport Some flights were diverted to other airports, with passengers taken by coach to Luton
Passengers queuing at Luton Airport The road leading to Luton Airport was also closed
Tent at Luton Airport Temporary tents were put up for waiting passengers
Passengers were evacuated at about 14:00 BST, and the airport reopened more than three hours later.
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