More than 20 police officers were injured in violence following a Premiership football derby.
Fans reported seeing bottles and rocks being thrown
Police said some of their officers received minor injuries in scuffles after the Birmingham City and Aston Villa match at St Andrew's on Sunday.
Trouble flared outside the ground after the game and violence spread to near the Bullring shopping mall in the city centre.
A police spokeswoman said 17 men were arrested and later released on bail.
Fans in the crowd said rocks and bottles were thrown and vehicles were damaged.
Eyewitnesses said that as Aston Villa fans tried to leave at the end of the game, which Villa won 2-1, about 200 to 300 Birmingham City fans gathered in the street outside the away entrance.
CCTV footage studied
Villa fans were shut in behind car park gates in front of the exit and behind a line of police, while some missiles were thrown from the street, including small rocks and pieces of glass.
It took nearly an hour for police to disperse the City fans and allow the Villa supporters to leave.
Officers are now studying CCTV footage of the trouble.
"The majority who attended the game were well-behaved and it was only a small element that caused the disruption," the police spokeswoman added.