West Ham United will face two Football Association charges over the crowd disturbances which marred their Carling Cup clash with Millwall at Upton Park in late August.
The Hammers have been charged with failing to control their supporters and failing to prevent them from entering the field of play, while Millwall have avoided any charge of their own.
An FA statement confirmed: "An independent Regulatory Commission last week heard charges issued as a result of the serious crowd disturbances in and around the West Ham United versus Millwall fixture at Upton Park on 25 August 2009.
"It was alleged that both clubs failed to ensure that their supporters conducted themselves in an orderly fashion.
"The independent Regulatory Commission, chaired by an Independent QC, found West Ham United to be in breach of FA rules in the following respects.
"Firstly, failure to ensure their supporters refrained from violent, threatening, obscene and provocative behaviour and secondly failure to ensure their supporters did not enter the field of play.
"The Commission will reconvene on Friday January 15 to consider the issue of sanctions. The Commission found all charges against Millwall not proven.
"The FA will now await the full written reasons from the independent Commission before making any further comment."