Nine men were arrested today by police investigating chanting following an FA Cup tie between Fulham and Charlton Athletic earlier this month.
Police were informed that a group of Charlton supporters were singing racist songs on a train after the match.
Officers from the Metropolitan Police and the British Transport Police visited homes in Bexley, Greenwich, Lewisham and Bromley this morning and arrested the nine men that have been accused of the crimes.
"We launched Operation Midas after a group of men, who we believe to be Charlton supporters, boarded a train at Putney and were heard chanting racist songs - something which was both offensive and extremely intimidating for other passengers on board," said Detective Inspector Ashley Cooper.
"My team of detectives have worked quickly to gather evidence and, by working closely with Charlton Athletic FC, coupled with excellent CCTV footage, intelligence reports and statements from witnesses, we've been able to move swiftly and make this morning's arrests."
The match ended in a 4-0 win for Fulham.