A man has been arrested on suspicion of a racially aggravated offence following Chelsea's League Cup win over Manchester United.
Pictures taken during Wednesday's fourth-round tie at Stamford Bridge appeared to show a fan making a "monkey" gesture.
Gavin Kirkham, 28, was bailed after being questioned at a west London police station on Monday.
United striker Danny Welbeck appeared to be the target of the alleged abuse.
The Metropolitan Police said Mr Kirkham was arrested after attending the police station by appointment.
He was released on bail until later in November.
Does anyone support this? This is totally Orwellian and wrong. How could the police purposely arrest someone for expression his harmless, but stupid, opinion? How do they know whos feelings may or may not be hurt, and why do they think they have the right to lock an innocent man up just for being a jerk?
http://www.bbc.co.uk/news/uk-england-london-20212989