BENTON HARBOR, Mich. -- Police are investigating an armed robbery that happened Tuesday evening at the Subway restaurant on W. Main Street, according to the Benton Harbor Department of Public Safety.

Officers were in the area at the time of the robbery, which happened at 8:35 p.m., so the suspect was located quickly, according to police.

The 21-year-old Benton Harbor resident was taken into custody.

During the course of his arrest, police located a pistol and the money taken from the register, according to reports.

The suspect's name is being withheld pending arraignment.