The First Niagara Bank, 861 N. Route 100, Upper Macungie Township, was robbed just before 10 a.m. June 15.

Upper Macungie police say a man, described as standing 5 feet 8 inches tall, with a slightly dark skin tone and dark scruff on his chin, entered the bank through the rear entrance and approached a teller.

He then brandished a silver revolver and told the teller it was a robbery.

The robber was wearing a clear mask and dark pants.

He had a dark, hooded sweatshirt pulled over his head.

His vehicle is described as a light colored (white or silver) sedan, police say.

The robber escaped with an undetermined amount of money through the same rear bank door.

A dye pack exploded and may have discharged red dye on the man, his clothing or vehicle.

No bank employees were injured, police say.

State Police Troop M Fogelsville and agents from the Allentown office of the FBI assisted at the scene.

Anyone with information on this robbery is asked to contact Upper Macungie Township Police Lt. Peter V. Nickischer at 484-661-5911.