Already relegated Aston Villa looked as though they might get a rare win after they led 2-1 at Vicarage Road, only to concede two late goals from Watford captain Troy Deeney.
The FA have revealed they are now investigating an incident which involves Ayew and team-mate Idrissa Gana Gueye, who got involved with the home supporters.
Reports suggest that the 24-year-old climbed over advertising boards to confront fans, after he hear something which oviously bothered him in the Sir Elton John Stand.
More to follow....