Police came under a barrage of bricks and bottles from hooligans on the night of the FA Cup derby clash between Birmingham City and Wolverhampton Wanderers.
West Midlands Police said officers faced “spontaneous disorder” before and after Tuesday night’s third-round tie at St Andrew’s.
Rival thugs clashed with each other and police in Digbeth High Street. Missiles were thrown at officers during the violent clashes.
The force helicopter helped commanders on the ground with crowd control.
A total of 14 people were arrested, mainly for public order offences. They were all later released on police bail while further inquiries are made into the trouble surrounding the tie which Wolves won 2-0.