The video shows a man walk into multiple Dollar Tree stores, pull out a knife and take money from the cash register.
Employees were inside the business at the time of the robbery.
Video shows man rob Dollar Tree stores with knife, Chicago police say
At least seven incidents have been reported by Chicago police:
-200-block of East 103rd Street on June 26
-10800-block of South Doty Road on July 9
-2000-block of East 95th Street on Jul 10
-10800-block of South Doty Road on July 12
-7100-block of South Stony Island on July 15
-10800-block of South Doty Road on July 23
-8700-block of South Stony Island on July 27
Anyone with information is asked to contact Chicago police.
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