The Hungarian champions could face possible punishment after reports of crowd trouble and missles being thrown towards the Millwall supporters and club officials during the game. Uefa have also took a dim view of the racist chants directed towards Millwall's three black players throughout the match.
The case will be dealt with on Thursday by the body's control and disciplinary panel but it will not deal with the trouble in Budapest before the game which left two Lions' fans in hospital with stab wounds.