United's Rio Ferdinand clutches his face after being hit with a coin
By Israel Ojoko
Nine people have been charged after the match between Manchester City and Manchester United on Sunday.
United's 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 breaching a football banning order.
Two men are accused of pitch encroachment, one with a public order offence and three with being drunk and disorderly.
All are due to appear before Manchester City Magistrates' Court on January 4.
Four others were arrested, including a 50-year-old man who was held for ticket touting but was released without charge.
A 45-year-old man was summonsed for a racially aggravated public order offence.
An 18-year-old woman was cautioned for being drunk and disorderly and a 33-year-old man remains in police custody after being arrested on suspicion of possessing a class A drug.
Ferdinand received a cut above his left eye when the object hit him as he celebrated Robin van Persie's late strike.
The Dutchman's deflected free-kick ensured United won the Premier League game 3-2 following a second half fightback from City, who had been 2-0 down at half time.