The ugly scenes on Sunday afternoon caused the postponement of Manchester United's clash with Liverpool at the iconic stadium. The cop, one of two police officers injured in the fracas, needed emergency hospital treatment for a "significant" slash wound to his face.
Andy Burnham, Mayor of Greater Manchester, has condemned the "minority" of United fans for their behaviour and police are demanding those responsible for the injuries are brought to justice.
Several hundred fans gathered at The Lowry hotel where United players were staying on Sunday, reports Manchester Evening News. Hundreds more gathered at Old Trafford as part of protests against the Glazer family's ownership and running of the club.
But police said demonstrators outside the ground became ‘especially aggressive and antagonistic towards police’ before a group of around 100 forced entry to the stadium.
Speaking today, Mr Burnham, 51, urged fans to "keep the focus on the behaviour of those at the top of the game".Insurance Loans Mortgage Attorney Credit Lawyer
The shocking image of the officer's injuries has emerged (Image: Manchester Evening News)
There is no excuse for the actions of a minority who injured police officers and endangered the safety of others.
Andy Burnham, Mayor of Greater Manchester
Mr Burnham, an Everton supporter, said: "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.
"It is important to make clear that the majority of supporters made their protest peacefully today.
"However, there is no excuse for the actions of a minority who injured police officers and endangered the safety of others.
"I send my best wishes to the police officers who have been hurt in the course of their duties this afternoon.
"This could be an important moment to change football for the better.
"We should all condemn violence of any kind and keep the focus on the behaviour of those at the top of the game."
Manchester United fans protests outside Old Trafford (Image: Manchester Evening News)Insurance Loans Mortgage Attorney Credit Lawyer
Flares were let off and missiles were launched (Image: Manchester Evening News)
Flares were let off and missiles were launched at officers, including bottles and metal barriers outside Old Trafford.
Officers had to be drafted in from