Belfast police clash with rioters in Ardoyne after rival marches
12 July 2012 Last updated at 20:24 BST
Police have used water cannon on rioters in the Ardoyne area of Belfast.
The disturbances happened after the police separated a Republican protest march from a loyalist demonstration in the area.
Earlier in the day, an Orange Order march passed peacefully near the area.
Andy Martin reports.