The Football Association is investigating claims made by a Bolton player that he and three team mates were racially abused by a fan during their match against Millwall.
Marvin Sordell, 21, tweeted about the alleged derogatory remarks.
Both clubs and the Met Police are also investigating his claims.
More top news
A 24-year-old man has been arrested on suspicion of murder after the body washed up on the Thames shoreline.
Seven people have now been arrested after a man died from serious head injuries
The 38-year-old officer was on his way home from a night shift when he collapsed. His death is not being treated as suspicious.