From the afternoon of August 9 to the early morning of August 10 local time, a large-scale violent robbery occurred in the center of Chicago, the third largest city in the United States, resulting in 15 injuries, two of them seriously injured by shooting, and more than 100 people arrested by the police. < / P > < p > Chicago police chief David Brown said that 13 of the injured were police officers; two of the seriously injured, a security guard and a civilian, had been sent to hospital for treatment. Police found five guns at the scene. Chicago Mayor Lori letterfoot called on the public to help identify the robbers, calling the violent robbery “a shameless and serious crime.”. < / P > < p > it is reported that the robbery first started in the south of Chicago and then moved to the city center. Hundreds of people stormed into downtown Chicago early Sunday morning, smashing windows, robbing shops and confronting police.