Bibb County Sheriff's Office was out in force before noon Tuesday at BB&T on Gray Highway in Macon.
Sheriff's Lt. Randy Gonzales said a man approached an armored truck driver who was servicing the ATM and robbed him of cash at about 11:20 a.m.
Gonzales said the assailant come up behind the employee who was holding a bag containing money. The robber bumped into the driver and grabbed the bag of money. He ran away. Authorities believe he may be driving a four-door Dodge Avenger, light brown or gold, with Clayton County plates.
It's unknown if this incident is related to a robbery at BB&T on N. Lee Street in Forsyth two hours earlier.