A SMART bus slammed into the back of a street sweeper before rush hour on Wednesday morning in Chesterfield Township.
The crash happened just after 6 a.m. on westbound 23 Mile at Baker, on Chesterfield Township's border with New Baltimore.
Police say four people were injured in the crash, some with serious injuries. The injured include the bus driver, two passengers and the street sweeper driver.
Right now, the circumstances of the crash aren't clear but there was heavy damage to the front of the bus.
23 Mile is closed for the accident but it's expected to be open around 9 a.m.