Bellamy scored twice in the match, which finished 4-3 to United
A man has been charged after an incident in which a Manchester City player confronted a fan who ran on to the pitch during the Manchester derby.
Striker Craig Bellamy approached the fan who ran on to the Old Trafford pitch after Michael Owen's late winner for Manchester United in Sunday's game.
Police said a 21-year-old, Jake Joseph Clarke, had been charged in connection with illegally entering the pitch.
They said he was due to appear before Trafford magistrates on 30 September.
Greater Manchester Police had said neither the fan nor Mr Bellamy, who scored two goals in the game which United won 4-3, had made a formal complaint.
They said Mr Clarke had been charged with going onto a playing area without lawful authority or excuse.
The force will also investigate a coin-throwing attack on City substitute Javier Garrido, who was struck as he headed down the tunnel at half-time.
Police said there were no reports of any widespread disorder between fans at either the ground or in the city centre.
Twelve people were arrested at Old Trafford for a variety of public order offences and a further 10 were arrested in the city.
A total of 51 supporters were ejected from Old Trafford during the match.