Coastguards and police are trying to establish the identity of a young man seen falling from the Humber Bridge.
Humberside Police received reports of the man, thought to be about 20, standing on the wrong side of the bridge's railings at 1800 BST, Tuesday.
He was then seen to fall into the water but a search by coastguards has failed to find a body.
Police are now looking through property left on the bridge to discover who the young man was.