The Football Association has charged West Ham United and Millwall in relation to the Carling Cup tie on Tuesday 25 August 2009.
Both clubs have 14 days to respond to their respective charges but West Ham United have issued a statement following today's developments. Click here to see the FA charges in full.
A West Ham United spokesman said: "We are reviewing the FA charges and will respond accordingly. In advance of the Millwall match, the club followed the strict advice of the police and relevant authorities at every stage of the planning process.
"That full cooperation continued on the night with the club working closely with police on a carefully set-out plan that was initiated and approved by the independent safety advisory group.
"We do acknowledge the appalling behaviour of a minority of fans inside the stadium and, in conjunction with the police, will continue to take strong and appropriate action against anyone found responsible."