Police are warning residents of robberies in Chicago Lawn.
A man walked up to victims and took their money and cellphones by force, according to a community alert from police.
The incidents occurred:
• At 2:10 a.m. July 9 in the 3500 block of West 71st Place.
• At 3:15 a.m. July 9 in the 3400 block of West Marquette.
• At 3:54 a.m. Sunday in the 7100 block of South Troy.