Police are working to identify a man who ran on to the pitch and attacked Sheffield Wednesday goalkeeper Chris Kirkland.
The man was one of a number of Leeds fans who ran on to the pitch in celebration after the West Yorkshire club scored their equaliser in the 1-1 draw at Hillsborough on Friday night. He shoved Kirkland in the face with both hands, knocking him to the floor.
Chief Superintendent Jason Harwin, of South Yorkshire Police, said a senior investigating officer would be working with a team of officers to identify those responsible for the disruption.
He said there had been five arrests for various offences including public order before and after the game, while three people were ejected from the ground and 12 were subject to dispersal orders.
In a statement released late on Friday night, he added: "First I would like to thank members of the public who have contacted us with information to help in the ongoing investigations following the incidents at Hillsborough tonight. Fans have now left the city and there has been no further reported incidents of violence and disorder."
Earlier he said there had been several incidents where seats and bottles were believed to have been thrown inside the ground.
A large number of the Leeds fans housed in the Leppings Lane End sang about child abuse charges dropped against Wednesday manager Dave Jones. The Wednesday fans also stoked things up with songs about two Leeds fans killed in Turkey in April 2000. Leeds supporters responded by throwing bottles onto the field and clashing with police.
Jones called for Leeds fans to be banned from "every away ground".
He went on: "You talk about racism, the chanting, that's a form of racism. And then (for the Leeds players) to go and wave at them... not in my book. You don't wave at them after that.
"I thought it had gone out of our game. The authorities have to look at it and sort it. I'm talking about an incident when we should be talking about the football. We're talking about vile animals. That's what they are. We talk about racism, but that, we need to sort that."