Demonstrators torched buildings and vehicles, and blocked roads in Belfast on Tuesday evening, a day after the stabbing, allegedly by a refugee originally from Sudan, shocked the United Kingdom.The 30-year-old suspect is due to appear at Belfast Magistrates' Court later on Wednesday charged with attempted murder. He is also charged with possession of a bladed article in public and threats to kill.The incident sparked widespread condemnation but appeals for calm from authorities went unheeded in some areas of the UK territory.Hundreds of protesters, many masked, gathered at several locations across Belfast, AFP journalists saw. A bus and several cars were set alight, while a building caught fire and its residents had to be evacuated."By 7:30 pm (18:30 GMT) they started (a) fire in the bins...we heard police cars and sirens," said one resident, Eemran, an engineer of Indian origin who has been living in Belfast for slightly over a year."More and more people started coming, they started throwing petrol bombs. Suddenly the fire started going... we had smoke inside the building...fire people came in and they said 'go down'," he said in broken English.Camila, a 36-year-old Chilean who moved to Belfast a month ago, said it was "scary"."Of course I'm not used to it," she said. "I understand the people's rage but also there are ways of discussing these things more peacefully".Sky television showed other buildings on fire.Police helicopters patrolled above the city and shops were also closed early.Michelle O'Neill, the First Minister of Northern Ireland, slammed the protests and urged calm."Groups of masked men burning families out of their homes is nothing less than disgusting cowardice," she said on X.