The men, wearing masks and armed with handguns, robbed A TCF Bank branch Sunday.
According to surveillance photos from the FBI, one of the men appeared to climb or reach over a counter while pointing a gun at a teller.
The other man also had a dark-colored Nike gym bag.
The robbery was at the TCF branch at 6410 West 127th Street in Palos Heights.
Anyone with information on the suspects should call the FBI.