On Saturday at least 18 cases of vandalism were reported to the Cheyenne Police Department.
Each case included a shot-out car window. Police say calls came from across the city, mostly in the north, north east and south.
This is the third time since December Cheyenne has seen something like this.
Police are still investigating and aren't sure if each incident is related.
If you have any information, you're asked to call police at 307-637-3500.