The robberies happened at three different locations on the city's North and Northwest sides in the early morning hours on Dec. 6:
- 2600-block of N. Lincoln Ave. at 2:21 a.m.
- 3000-block of N. Pulaski Rd. at 03:43 a.m.
- 3200-block of W. Diversey Ave. at 03:46 a.m.
In the video, you can see the suspects rush in wearing masks.
They pull out guns, and then force employees to open the cash register.
In one incident, the thieves punched a worker, and in another case, they also robbed a customer.
Police are still looking for the four men involved.
INTERACTIVE SAFETY TRACKER Track crime and safety in your neighborhood