Aston Villa have made a formal apology for the pitch invasion on Saturday night.

Investigations are now underway after fans invaded the pitch before and after the final whistle of Aston Villa's FA Cup win over West Bromwich Albion.

Villa later apologised to West Brom and the FA for their supporters' behaviour in a statement.

"They have let both themselves and their club down," it read.

"The club extends its sincere apologies to the Football Association, the West Bromwich Albion directors, manager Tony Pulis and all his staff and players."