Updated: April 1, 2013 1:35PM
The windows were smashed in 20 vehicles overnight in the South Loop.
Police began receiving calls about 8 a.m. about driver-side and passenger-side windows being broken on vehicles in the 1300 block of South Wabash Avenue, police News Affairs Officer Jose Estrada said.
No items were reported stolen from any of the vehicles, Estrada said.
No one is in custody and Area Central detectives are investigating.