Arlington police and the county’s bomb squad are on the scene of a possible pipe bomb in the Arlington Heights neighborhood.

Just before 3:00 p.m., an off-duty police officer was asked for directions by a driver in a vehicle with New York tags. The officer noticed drug paraphernalia in the vehicle and called in backup, according to a fire department official.

The car was stopped and the driver detained on the 100 block of S. Highland Street. Officers then noticed a pipe with two caps on each end in the back of the stopped vehicle, the official said. Believing that the device could be a pipe bomb, the street was shut down between Arlington Blvd and 2nd Street S. and the bomb squad was called in.

A robot was used to inspect the device, and a technician in heavy protective gear is now reportedly trying to defuse the device.

Residents in the area are being asked to shelter in place in their homes.