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Chicago police have released surveillance images after a series of robberies at Chicago CVS stores. Police say four CVS stores have been targeted by two offenders since September. These images are from two of the incidents at CVS stores in the 3900-block of W. 63rd St. and the 7800-block of S. Western. In each incident, police say, the suspects have entered the store, displayed handguns, and taken cigarettes and bus passes from the counters and cash from the cash registers.