Smoke billowing into sky from two-alarm fire in Sterling

Smoke over Sterling, Virginia (photo courtesy Alan Henney/Twitter)

(Updated 4:50 p.m.) Firefighters are battling a two-alarm fire with possible hazardous materials at a warehouse in Sterling.

Smoke is billowing into the skies over Fairfax from a fire at Prospect Waterproofing Company (118 Acacia Lane). It is possible that a gas line was struck, per scanner traffic. Police said at 3:31 p.m. that the gas exposure has been controlled.

The building reportedly contains ion batteries and diesel generators.

Hazmat units were requested to assist.

The fire was reported around 3:10 p.m.