Chicago police have issued an alert about a string of armed robberies over three days in South Shore.
In each robbery, two robbers approached a victim at gunpoint, police said.
The first attack occurred around 11:30 a.m. May 2 in the 7300 block of South Blackstone Avenue, police said.
Another person was robbed about two hours later in the 1800 block of East 73rd Street, officials said.
The third robbery occurred last Wednesday afternoon in the 7200 block of South East End Avenue, authorities said.
The robbers wore black clothing and masks, police said.
