Bolton striker Marvin Sordell has revealed that he and three of his team-mates were racially abused by Millwall fans on Saturday.
Sordell, 21, made the claims on Twitter and said he has reported the incident that saw midfielders Lee Chung-yong and Darren Pratley, plus fellow forward Benik Afobe, subjected to racist taunts by some home supporters during his side's 2-1 defeat at the Den.
Sordell said on Twitter: "Putting the match aside, its 2012 in england and people are still shouting racial abuse at a football game!? £Shocking.''
He added: "Chungy, Pratts, Benik and i had all sorts of things said to us. The police were standing yards away and did nothing...''
Sordell also received abusive responses to his allegations on Twitter.
He added: "Funniest thing is if had come on and scored and gave them some back, i would be the one who got fined.''
Millwall later released a statement, saying: "Millwall and Bolton Wanderers are investigating allegations made by Bolton player Marvin Sordell that he was subjected to racial abuse by an individual whilst warming up as a substitute during Saturday's Championship clash at The Den.
"The two clubs remain determined to do everything in their power to ensure that racist behaviour will not be tolerated.
"We will be speaking to the police and the match officials on this matter but no further comment will be made until this process has been completed and the investigations have been concluded.''