(Reuters) -- A contract worker at a DuPont plant in upstate New York was killed on Tuesday after a chemical storage tank exploded during a welding operation.
Workers were cleaning and repairing an empty tank at the DuPont Yerkes plant in Tonawanda, New York, just outside Buffalo, when "an explosion took place which resulted in the injuries," DuPont, one of the world's largest chemical makers, said in a statement. Another contract worker was injured and taken to a nearby hospital.
The blast may have been caused by fumes or residue from whatever chemical the 10,000-gallon tank once held. DuPont said it has shut down the equipment involved in the explosion, and that no hazardous material was released into the environment.
The company did not evacuate the plant, and all 700 workers are accounted for.