Chelsea will co-operate fully with the FA investigation into crowd trouble which marred the end of their derby clash with Fulham yesterday.

The FA and Fulham have already announced an inquiry into the trouble which saw rival fans clash on the pitch after Fulham's 1-0 victory at Craven Cottage over the league champions.

Chelsea condemned the actions of supporters, including its own, for the pitch invasion and promised to ban any of its supporters who are found guilty of breaking the law.

The club has already been in contact with Fulham and the local police to request material that could identify anyone who went on to the pitch.

Arrests were made after fans from both clubs forced their way past stewards onto the pitch where a number of fights took place.

The FA is examining the scenes.

A Fulham spokeswoman said: "There will be an official investigation into yesterday's events at Craven Cottage."