Chicago police issued an alert Monday night after several robberies involving physical force occurred in August in Grant Park, New Eastside and the Loop.

In each incident, robbers targeted people who were alone in parks and strong-armed them to steal gold chains or necklaces, police said.

The reported incidents occurred:

Aug. 1 about 9:30 p.m. in the 1100 block of South Columbus Drive (Grant Park) Aug. 2 about 9:45 p.m. in the 200 block of East Balbo Drive (Grant Park) Aug. 11 about 3:44 p.m. in the 300 block of South Columbus Drive (Grant Park) Aug. 13 about 5:25 p.m. in the 300 block of East Wacker Drive (New Eastside) Aug. 22 about 8:43 a.m. in the 0–100 block of East Wacker Drive (Loop) Aug. 22 about 8:48 a.m. in the 0–100 block of East Wacker Drive (Loop) Aug. 22 about 11 a.m. in t

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