Aston Villa manager Martin O'Neill has been charged with improper conduct by the Football Association, following his behaviour towards referee Mike Riley after the defeat to Manchester United on Sunday.

Villa had led 2-1 at one stage but lost the match 3-2 after conceding a late goal when teenager Federico Macheda scored a stoppage-time winner. O'Neill later claimed Riley missed a foul on Ashley Young in the build-up to Macheda's winner.

After the match he said: "The officials also got three offside decisions wrong when we were clean through."

The FA have confirmed that the charge relates to O'Neill's behaviour in the immediate aftermath of the match, rather than his critical comments.

The Northern Irishman marched onto the pitch at the final whistle to confront Riley, and it is that action which has landed the Villa manager in trouble with the authorities. He has until Monday 27 April to respond to the FA's charge.