Nine people have been charged after Monday's English Premier League football match between Manchester City and Manchester United.
The United defender Rio Ferdinand was injured when he was hit by an object thrown from someone in the crowd at the end of the derby game at the Etihad Stadium.
Police are still trying to identify the person responsible for the attack.
However, officers have charged nine people, including one with racially aggravated public order and two with encroaching on the pitch.
Two people are accused of breaching a football banning order, one with a public order offence and three with being drunk and disorderly.
Ferdinand received a cut above his left eye as he celebrated Robin van Persie's late matchwinner.