Two Frederick County men were arrested after an off-duty Montgomery County police officer witnessed a bank robbery in Damascus, police said.

Officer William Morrison was operating his marked patrol vehicle on Thursday morning in the driver-thru of the M&T Bank located at 9801 Main St. when he witnessed a teller acting strangely and then saw a man rob the bank. Morrison confronted the suspect, 23-year-old Benjamin Edward Hansberger, as the man was exiting the bank, and Hansberger then fled on foot, Montgomery County police said.

Hansberger then tried to enter a waiting vehicle, operated by 42-year-old John Conley Laforce, that was waiting in the parking lot of the Damascus Library. The vehicle left the lot and was stopped by Morrison a short distance away, and Laforce was taken into custody, police said.

Hansberger went into a wooded area behind the library, so Morrison called for assistance. A police K-9 team found Hansberger in the woods, and he was then arrested.

Laforce and Hansberger were arrested on robbery charges in connection with Thursday's incident. Additionally, they were charged in a robbery at the same M&T branch that took place on May 17, police said.

Money from Thursday's robbery that Hansberger dropped as he was fleeing has been recovered.