An unattended Charm City Circulator bus hit five vehicles and a building Saturday afternoon, Baltimore police said.
Shortly before 3 p.m., the bus was parked on the 1500 block of North Charles Street, which is near Penn Station, when "for whatever reason, it drifted backward into traffic," Det. Donny Moses said.
The bus hit five vehicles that were stopped at the red light, he said. It also struck a light pole before hitting a building at 1420 N. Charles St.
Several people had minor injuries, Moses said.
The building is listed as an administrative office of the University of Baltimore. A building inspector visited to assess structural damage, but Moses did not have the results of that inspection Saturday night.
Police are still investigating the incident, including why the driver left the bus.