'Bomb' thrown by Juve fans in bad-tempered derby
Nine people were injured when a paper explosive exploded during the Turin derby between Torino and Juventus.
The bomb - like a banger with a small explosive charge - was thrown from the Juventus supporters' end early in the Italian Serie A match at Turin's Olympic Stadium after violence had broken out before the game even began.
The bomb was thrown in response to other objects being hurled by the Torino home fans.
Two Juventus fans and one Torino supporter were arrested over the incident during the match and a further two Juventus fans were detained in relation to disturbances outside the stadium.
Violence flared before the game when 300 Torino fans tried to block the Juventus team bus from entering the stadium compound and threw stones at the vehicle, breaking one of its windows.
Media reports said Torino fans also threw eggs and bottles.
Torino ended 20 years of Juventus dominance as they beat their city neighbours 2-1 on Sunday, crowning a remarkable four years under the leadership of journeyman coach Giampiero Ventura.