Source:
The GuardianAs Northern Ireland reached the climax of the Ulster loyalist marching season, police reported that 24 officers had been injured in violence surrounding the parades.
There was a new, serious outbreak of violence in north Belfast last night with police firing dozens of baton rounds and using water cannon in clashes with nationalist youths.
The trouble erupted within minutes of an Orange Order parade passing by shops in the Ardoyne district shortly after 7pm. Disorder spread across the city. Although the police were able to pin back rioters and keep them away from loyalists in the contentious parade, trouble broke out shortly afterwards on the Crumlin Road.
Last night, two different sets of protesters attacked riot police at two entry points into the republican Ardoyne area. Police officers were pelted with bricks, rocks, bottles and petrol bombs as well as fireworks. One group of rioters set fire to a hijacked car at the junction of Crumlin Road and Woodvale Road, not far from where a smaller group of loyalists were standing, in Twaddell Avenue.
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http://www.guardian.co.uk/uk/2011/jul/12/violent-clashes-belfast-marching-season