Authorities in Charlotte have imposed a citywide curfew as protests continue into the third night, after a protester shot Wednesday died of his injuries. Police said 26-year-old Justin Carr died Thursday after being in critical condition. He was shot while protesters clashed with riot police at around 8:30 p.m. on Wednesday, though police have stressed that he was not shot by the police. Witnesses said they saw a man fire a gun into the crowd and then run off. No arrests have been made. Meanwhile, Mayor Jennifer Roberts announced a curfew from midnight until 6 a.m. in the hopes of curbing the chaos. The curfew looked set to be tested late Thursday, however, as protesters climbed onto Interstate 277 and blocked traffic around 11 p.m. The protests erupted Tuesday after the fatal police shooting of 43-year-old Keith Scott, who police say was holding a gun and ignored orders to drop it. Scott's family and friends say he was holding a book when he was shot.