Northern Irish police vows an increased presence on the UK province's streets after graphic footage shared online of a stabbing in Belfast by a Sudanese suspect prompted anti-immigration protest calls. "The public can expect to see an increased police presence across Northern Ireland this evening and in the coming days," Assistant Chief Constable Ryan Henderson tells a press briefing, as demands for demonstrations circulate online. A man in his 40s was hospitalised with serious injuries to his face, neck and back following a stabbing incident late Monday. IMAGES AND SOUNDBITES