- Police launch investigation into allegations of "racist gesture" by Chelsea supporter
- Supporter photographed in British national newspaper making alleged gesture
- Manchester United striker Danny Welbeck appeared to be the target of alleged abuse
- Chelsea promise to "take the strongest possible action, including criminal prosecution"
English football's battle to eradicate racism suffered another blow on Thursday as police launched an investigation into allegations that a Chelsea supporter made a racist gesture towards a Manchester United player.
A photo of the fan making a "monkey" action, which appeared to be targeted at United's Danny Welbeck during a League Cup match that Chelsea won 5-4, was published in a British newspaper Thursday
Chelsea has launched its own investigation into the matter and has already promised to assist the police in any way possible.
A statement from the Metropolitan Police read: "Today, Thursday, November 1, police have received a complaint regarding alleged racist behavior at Stamford Bridge last night, Wednesday, October 31.
"An investigation has been launched. There have been no arrests and enquiries continue."
The incident follows Chelsea's claim that a referee made racial comments to one of the club's players during Sunday's 3-2 home defeat by United -- a controversial match in which the Premier League-leading team had two men sent off.