Rioters attack police with petrol bombs , fireworks and bricks , police respond . Police retreat from the area after a policeman is shot . Sinn Fein blamed the attacks on Catholics on members of the Ulster Volunteer Force , a loyalist paramilitary group that officially disarmed in 2009 . Police also clashed with rioters in West Belfast itself . Northern Ireland has seen a resurgence of violence in recent months .
Rioters attack police with petrol bombs , fireworks and bricks , police respond . Police retreat from the area after a policeman is shot . Police also clashed with rioters in West Belfast itself . Northern Ireland has seen a resurgence of violence in recent months .