Greater Manchester Police say they are still working with the Manchester City football club to identify the spectator who threw the coin which struck Rio Ferdinand towards the end of Monday's Manchester Premier League derby.
Images of Ferdinand's bloodied face cut-open just above the eyebrow and City's goalie Joe Hart holding back a fan who had invaded the pitch following Robin van Persie's stoppage-time winner to confront Ferdinand have been published around the globe, tarnishing what was a thrilling encounter.
Meanwhile the English FA chairman David Bernstein has suggested life bans for fans who "hijack" matches with bad behaviour.
10 spectators face police charges in connection with the match.
