The Football Association has confirmed it will hold a full investigation into the crowd trouble that marred Fulham's 1-0 victory over Chelsea on Sunday.
Fans from both clubs forced their way on to the pitch at full-time and a handful of scuffles took place.
"The FA condemns the behaviour of the mindless individuals who invaded the pitch and will have an investigation," said chief executive Brian Barwick.
Fulham added: "We will have an official investigation into Sunday's events."
Chairman Mohamed Al Fayed earlier told BBC Sport: "Some of them are hooligans but most of them behaved."
"I'm told there was a bit of trouble. There's no place for idiots at Fulham"
Barwick continued: "The investigation will begin with immediate effect and we will work closely with police, clubs and media.
"Once identified, the FA would expect the fans concerned to face police charges and banning orders to be sought.
"The scenes on Sunday were unacceptable and we all must continue to work hard in this area.
"Thankfully, these kinds of incidents are few and far between these days and that is due to the increased vigilance of our game.
"It is also why behaviour of this nature must be treated seriously and swiftly - sending a clear message to those involved that their actions will not be tolerated."
Chelsea have also said they will co-operate with any investigation.
A statement read: "Chelsea condemns any behaviour, even if provoked, that leads to pitch invasions. This is a criminal offence and there is no place for such behaviour at Stamford Bridge or at any other football ground.
"Chelsea has already been in contact with Fulham and the local police requesting material that could lead to the identification of any supporter who entered the pitch.
"If there is sufficient evidence, any individual will be prosecuted by the police, with the full backing of Chelsea. They will also face disciplinary action by the club and be banned from Stamford Bridge.
"The huge majority of Chelsea supporters give the team great support every week and their behaviour is impeccable. We do not want their reputation tarnished by the actions of a tiny minority."
Fulham boss Chris Coleman said: "I'm told there was a bit of trouble and there were one or two idiots on the pitch. There's no place for idiots at Fulham."