CHICAGO (WLS) -- It's an alarming trend: Chicago police say there have been at least 12 different robberies dating back to Aug. 1. All of them happened on some of downtown's busiest streets.

One of those incidents happened in broad daylight this week near Michigan Avenue and Wacker Drive. That area is always filled with people walking around.

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Chicago police say, in each of the incidents, a group of suspects targeted a person who was alone while using physical force to take gold chains or other personal belongings off the victims.

The incidents took place at the following locations:

- 9:30 p.m. Aug. 1 in the 1100-block of South Columbus Drive (Grant Park)

- 9:45 p.m. Aug. 2 in the 200-block of East Balbo Drive (Grant Park)

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