West Ham striker Carlton Cole reportedly had to be restrained by police and stewards after a confrontation with an unhappy fan immediately after his side's loss to Wolves on Tuesday night.
Cole's strike partner Benni McCarthy said after the match Cole's team-mates had to get involved to drag Cole off the pitch and into the dressing room.
The 3-1 defeat at Upton Park puts Hammers manager Gianfranco Zola under extreme pressure as the club slips another loss closer to relegation - a fate new owners David Sullivan and David Gold will be desperate to avoid.
Cole received a volley of abuse from irate home fans while leaving the pitch after the match, before he allegedly returned the treatment with some words of his own and then came back out for a second time to continue the argument, at which point team-mates and police intervened.
McCarthy said: "I thought Coley knew the guy at first as they were speaking normally. Eventually I saw some other players go back out and drag him inside. Maybe what went on today got to him and he reacted the wrong way.''