Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Chicago Limits Downtown Access After Night of Violent Protests Associated Press CHICAGO - Chicago officials took extraordinary steps Sunday to patrol and restrict access to the city's downtown in the hopes of preventing further chaos after a night of tense protests over the death of George Floyd that included violent clashes, hundreds of arrests and smashed windows at stores and banks. Mayor Lori Lightfoot, who had already ordered an indefinite nightly 9 p.m. curfew, said the Illinois National Guard had been requested to help keep order. She said only essential workers would be allowed into the central business district, city trains and bus service would be suspended, major streets would be blocked with city sanitation trucks and Chicago River drawbridges allowing pedestrians and vehicles into downtown would remain lifted. "Seeing the murder of George Floyd sickened me and it still does," Lightfoot said at a news conference, taking several breaks to compose herself. "But rather than respond to his death as we should and focus our energy toward doing the hard work to create the change that we need, we have instead been forced to turn our focus and energy toward preventing wanton violence and destruction" She called for a 5 p.m. moment of silence for Floyd, a handcuffed black man who died last Monday after a white Minneapolis police officer pressed his knee into Floyd's neck for several minutes as he pleaded for air and eventually stopped moving. That officer, Derek Chauvin, and the three others who were arresting Floyd have been fired, but only Chauvin has been charged -- he faces counts of third-degree murder and manslaughter. Floyd's death and the broader issue of the treatment of black people by police inspired protests in dozens of cities throughout the country, including other Illinois communities such as Peoria and Rockford. .