Postal Service employee robbed at gunpoint in Billerica. What was taken

Police in Billerica say a U.S. Postal Service employee was robbed of a so-called arrow key on Thursday, July 30, outside a facility on Brick Kiln Road.

In a press release issued by John Guilfoil Public Relations, police said they were called at about 4:25 p.m. to the Postal Service sorting facility at 5 Brick Kiln Road for a report of a robbery outside.

Officers arrived to learn that two men in a four-door black Cadillac displayed a handgun and demanded an arrow key from a Postal Service employee in the facility's parking lot, according to the release. The suspects then drove off toward Chelmsford Street (Route 110).

An arrow key is a universal master key used by letter carriers to open collection boxes and multi-unit panels quickly. Stolen keys allow thieves to harvest checks and other mail.

There were no reported injuries, according to the release.

The incident remains under active investigating by the Billerica Police Department and law enforcement partners.

This article originally appeared on wickedlocal.com: Postal Service employee robbed at gunpoint in Billerica. What was taken