Airport workers and travelers were evacuated from the area when the alarms went off, Aftenposten reported.

The buckle, found in the man's luggage, was just a fashion accessory but was designed to look like a hand grenade, police said.

Three planes halted during the emergency were later allowed to take off.

The belt's owner said taking the item to the airport was a "dumb" thing to do.

Police said he left the buckle behind before continuing on his trip.