Police in Northern Ireland have warned they will put up a "robust" response to any more street unrest - and said reinforcements from Great Britain would be deployed.

Belfast police appealed for calm after a violent knife attack caught on videophone prompted calls for anti-immigration protests. This followed a week of migration-related riots…

Videos from Belfast show protesters setting bins and a bus on fire amid the unrest. | World News

Police fired water cannons at protesters after bricks were hurled at officers