Police evacuated the main terminal at Manchester Airport after bomb disposal experts were called to check a suspicious package on Wednesday.
Greater Manchester Police said they were questioning a man under anti-terrorism laws.
"We were alerted to a suspicious device and as a precaution have evacuated Terminal 1," said Superintendent Phil Davies in a statement. "I must stress that at this time the item is being treated as a suspicious device and nothing more."
Manchester Airport is Britain's fourth biggest and handles around 20 million passengers each year
Short link: