A City fan also ran onto the field to confront Ferdinand after the winning goal was scored, with goalkeeper Joe Hart forced to intervene. A smoke flare was thrown onto the pitch.

Greater Manchester Police also confirmed after the match that a man was arrested inside the Etihad Stadium following allegations of racist chanting.

The Football Association has launched an investigation into the incidents.

Wayne Rooney was also pelted with coins as he took a corner in front of City fans late in the game and, as tempers boiled over, former United player Carlos Tevez kicked out at Phil Jones right in front of United manager Sir Alex Ferguson.

At the final whistle, stewards tried to prevent United’s players celebrating in front of their supporters.

The FA said it would liaise with Greater Manchester Police and await the reports from the crowd control advisor and the match referee.

An FA spokesperson said: ‘It is disappointing that after a great game and advert for the Premier League that we are discussing this issue.

‘We will work with the clubs and authorities to identify those responsible and support the strongest sanctions available, including life bans.

‘We condemn any such acts and it is simply unacceptable that any player is exposed to injury in this way. To witness Rio Ferdinand leaving the field with a cut above his eye to receive treatment is appalling.

‘Football in this country has made great progress over recent decades. However, we must maintain the safety and security inside of our stadia and to do this we need to isolate and identify any individuals guilty of offences with strong penalties to act as a deterrent to others.’

Ferdinand showed his sense of humour after the game, tweeting: ‘what a result,3points! Sweet! Whoever threw that coin,what a shot! Can’t believe it was a copper 2p….could have at least been a £1 coin!

‘Respect to Joe Hart for protecting that idiot who ran on!! Love the banter between fans but there is a point when it goes too far…calm it!’