NI police chief Matt Baggott says Belfast riots 'shameful'
Another 400 police officers are due in Northern Ireland following hours of serious rioting in Belfast.
Chief Constable Matt Baggott described the trouble, which injured 32 police officers and an MP, as "shameful and disgraceful".
Clashes developed when police enforced a ban on an Orange Order march and trouble flared in the Ardoyne area of the city.
Chris Buckler reports.