Aerial footage of rioting taken by Northern Ireland police
13 July 2013 Last updated at 14:08 BST
Northern Ireland's Chief Constable Matt Baggott has described the rioting in Belfast which injured 32 police officers as "shameful and disgraceful".
MP Nigel Dodds was also injured during the six hours disturbances on Friday.
Clashes developed when police enforced a ban on an Orange Order march.
Gordon Adair reports.