There were three attacks this month.
The robberies happened on the West and Southwest sides at the following times and locations:
- 100-block of North Western Avenue on Saturday, Aug. 17 at 10:05 p.m.
- 600-block of West 18th Street on Saturday, Aug. 17 10:15 p.m.
- 2000-block of West Fulton Street on Sunday, Aug. 18 at 3:55 a.m.
Police said several armed suspects approached victims at gas station pumps, demanded their property and threatened them.
Police said the suspects wore masks and drove off after each attack, possibly in a white KIA and a dark Dodge Charger.
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