About 100 fire fighters are on the scene of a blaze at Rosedale Roofing Co., officials said Monday.
The fire at the business on the 1200 block of Middle River Road was reported shortly after 1:30 p.m., said Capt. Bruce Schultz of the Baltimore County Fire Department. No injuries have been reported.
Fire fighters are using about 30 pieces of equipment, he added.
Middle River Road is closed between Philadelphia Road (Route 7) and U.S. 40, said Julia Hardgrove, spokeswoman for the county police and fire departments. Motorists are urged to avoid the area tonight.
The cause of the fire is under investigation, Schultz said.
Officials say they expect fire fighters to work into the night to bring the fire under control. They have deployed heavy equipment to remove a wall in the building.