These dramatic images show Millwall fans clashing with riot police and stewards at Rotherham United yesterday.
Three police officers and two stewards were injured during the disorder, with trouble continuing outside the ground after the game.
No arrests were made but police are examining CCTV as they launch an investigation.
Trouble started after Rotherham scored in the 85th minute, with a number of Millwall fans trying to get into two home stands at the New York Stadium.
Chief Superintendent Jason Harwin said: “Officers have worked with both clubs prior to today’s game in an attempt to prevent such unacceptable behaviour.
“Again we see a minority of individuals spoil the event for many others. They aren’t a true representation of genuine football supporters and have no place in football. Such action can not be tolerated
“I thank the bravery and courage of stewards and police officers in tackling such criminal acts and we will now review evidence to identify and bring to justice those that are responsible for such criminal acts.”
Anyone with information about the incidents which took place both inside and outside the stadium is asked to call 101 quoting incident number 290 of February 28 2015.
The match saw Rotherham win 2-1, damaging Millwall’s chances of staying in the division.