A 21-year-old man is fighting for his life after he crashed into a metal fence at a school in Grimsby.
Police are looking for the motocross bike he was riding, which was removed from the scene before emergency services arrived.
He was said to be riding a white motocross bike when he crashed on Weelsby Street shortly before 6.30pm on Sunday, September 22.
Emergency services attended and the man was taken to hospital with life-threatening injuries.
Humberside Police has appealed for information after the bike involved in the crash went missing.
Anyone with information is being urged to call 101 and quote incident 554 of September 22 or call Crimestoppers anonymously on 0800 555 111.