At least six people were killed after an unknown perpetrator fired shots during a Fourth of July parade in Highland Park near Chicago, officials say. According to a police spokesperson, 24 people have been brought into hospital following the shooting in the Chicago suburb. The shooter was still fugitive, the spokesperson said, but a weapon had been recovered at the crime scene. Highland Park Mayor Nancy Rotering urged people to avoid the city centre. “Numerous law enforcement officers are responding and have secured a perimeter around downtown Highland Park,” the city administration said in a …