Manchester United will punish fans who committed criminal acts during the protests on Sunday which led to the Premier League game against Liverpool being postponed, the club said on Monday.
United fans protesting against the club's American owners, the Glazer family, stormed into the stadium which was closed to fans due to Covid-19 restrictions.
"The majority of our fans have and will condemn criminal damage, along with any violence towards club staff, police or other fans, and these now become a police matter," United said in a statement.
"The club has no desire to see peaceful protestors punished, but will work with the police to identify those involved in criminal activity, and will also issue its own sanctions to any season ticket holder or member identified, per the published sanctions policy," the statement added.
Greater Manchester Police (GMP) said two officers were injured with one requiring hospital treatment after he was attacked with a bottle and suffered slash wound to his face.
The Premier League said it recognised the strength of feeling among fans.
"The actions of a few clubs cannot be allowed to create such division and disruption. We are determined to establish the truth of what happened and hold those clubs accountable for their decisions and actions."
The fan protests against the Glazers, which have been taken place since they bought the club in 2005, have been reignited since United's involvement in the attempt to create a breakaway European Super League. Prime Minister Boris Johnson, who publicly opposed the Super League plans, said he understood the motives behind the protests.
Greater Manchester mayor Andy Burnham also expressed support for the aims of the protesters.
"I fully understand the long-standing concerns of Manchester United supporters about both the ownership and financing of their club and the wider running of football," he said.
"It is important to make clear that the majority of supporters made their protest peacefully...however, there is no excuse for the actions of a minority who injured police officers and endangered the safety of others."
"Information on the rescheduling of the game and any possible implication on other fixtures will be announced after discussion and agreement with the Premier League," United said.