A 42-year-old man has been arrested after Roy Keane was allegedly assaulted during Arsenal's 3-1 win over Man Utd at the Emirates Stadium on Sunday.
The arrest comes after video footage circulated on social media showing Sky Sports pundits Micah Richards and Keane involved in an altercation with an individual.
Keane, a former United captain and Republic of Ireland international, was reportedly heatbutted in the incident.
Sky Sports said Richards, a former Man City and England international, was "acting to defuse a situation."
In a statement, the Metropolitan Police said: "Police are investigating an incident at Emirates Stadium on Sunday, 3 September, during which a man was assaulted.
"On Monday, 4 September, a 42-year-old man was arrested on suspicion of assault (ABH). The man has been taken into police custody. Enquiries are ongoing."
