A building has been evacuated in Potomac Yard after construction crews struck a large gas line.

The National Industries for the Blind building was evacuated and E. Glebe Road closed between Main Line Blvd and Potomac Avenue due to concerns about the escaping natural gas. Alexandria police and firefighters are on the scene, awaiting crews from Washington Gas to shut off the line.

A slight natural gas smell was also reported in the nearby Potomac Yard Target store, according to scanner traffic.

Employees are being allowed back into the NIB building, but those who do not feel comfortable doing so are being allowed to take unscheduled leave, we’re told.

Vernon Miles contributed to this report