Los Angeles, California (CNN) -- An explosion at a welding shop in south Los Angeles killed one man and critically injured another person Friday morning, according to the Los Angeles Fire Department.
The injured person suffered severe burns and was taken to an intensive care unit, said department spokesman Erik Scott. The fire department previously had reported two deaths.
Firefighters dodged debris falling around them to rescue the victims, Scott said.
It was not immediately known what caused the devastating blast, which blew out a wall and collapsed the roof, Scott said.
The shop stored natural gas, oxygen and acetylene for the welding operations, he said.
The explosion was powerful enough to hurl people near the building across a street where they were pinned under the axle of a vehicle, he said.