A man arrested on suspicion of racist behaviour after a clash between Chelsea and Manchester United will face no further action.
Pictures taken during the fourth-round tie at Stamford Bridge on October 31 appeared to show a fan making a "monkey" gesture.
A 28-year-old man was arrested over alleged racist behaviour and banned by Chelsea.
In response to today's decision, a club spokesman said: "We're currently reviewing the situation."
Other fans in the crowd were interviewed and CCTV footage has been examined but "a decision was taken with the Crown Prosecution Service to proceed with no further action," a Scotland Yard spokesman said.
He added: "The Metropolitan Police Service (MPS) takes any allegation of racist chanting and/or behaviour very seriously and if any matters are brought to our attention they will of course be thoroughly investigated.
"The MPS routinely work very closely with football clubs and partner agencies to monitor behaviour to ensure public confidence and safety."
Paul Scott
1:24am on 14/12/2012
He was caught on camera what more do you want
Pat TWOMEY
8:28pm on 15/12/2012
You need more than a still foto for the CPS to even consider a worthwhile prosecution, how else can you explain it. Strange, how there was no moving pictures posted anywhere, wasn`t it? A good brief would have simply said he was merely carrying two rolls of invisible carpet and suffered from outbursts of Tourettes:)