Pair of United fans sleep in Old Trafford toilets in bid to sneak into Arsenal game

"We realise people will go to any lengths to watch a game at Old Trafford."

Manchester United are investigating how two supporters managed to stay overnight at Old Trafford before Saturday's match with Arsenal.

The pair, reported to be foreign students, were part of an official stadium tour on the eve of the match, but managed to cut away from the group and stay at the ground.