A man has been arrested in connection with allegations of racist abuse aimed at Leeds striker El-Hadji Diouf by Millwall fans.
The 53-year-old man was arrested after Sky Sports News last night broadcast footage which appeared to show some of the London club's fans hurling insults at the Senegalese forward during a game at the Den in November.
Millwall Football Club said it was "appalled" by the footage and vowed to reopen an investigation into allegations of racial abuse, which initially emerged online.
Club captain Danny Shittu said he was "deeply saddened" by what he had seen in the documentary.
The man, from Enfield, north London, remained in custody tonight on suspicion of a racially aggravated public order offence, a Metropolitan Police spokesman said.