Police say the victims are all using an ATM that's not inside the bank lobby when approached by the offenders. Some were in their cars in the bank's drive-thru, and one of the victims was in a wheelchair.
Officials say one to three people are involved in the robbery, and they take the money by force, or, in some cases show or imply they have weapons.
Several ATM robberies have been reported:
Four out five of the robberies involved a single offender. One offender said he had a gun, another a knife.
"Pay attention to your surroundings," Keion Hinton, drive-thru ATM user, said. " I probably will stop coming to this one."
Chicago police are warning bank customers to be on alert and pay attention.
