Masked men burned families out of their homes in Belfast and torched ​a number of vehicles in a wave of anti-immigrant violence on Tuesday night that followed a knife attack by a Sudanese man. Hundreds of protesters, many with their faces covered, attacked police and burned vehicles in a number of locations across Northern Ireland after a video of the knife attack, which left one person with serious neck and head wounds, went viral. FRANCE 24's Hervé Amoric reports from Belfast.