DALLAS (AP) - Investigators have found similarities between this week's fiery blasts at a Texas gas facility and 2005 explosions at a Missouri plant.
The U.S. Chemical Safety and Hazard Investigation Board has begun its probe of Wednesday's accident in Dallas that left three people hurt.
Officials had to sidestep dozens of mangled acetylene tanks and burned-out vehicles left from explosions at Southwest Industrial Gases.
The scene reminded some of explosions at a Praxair plant in St. Louis where thousands of cylinders caught fire, some shooting like missiles into the sky.
Investigator Robert Hall says the incidents are similar in the way they cascaded in a domino effect, spreading from cylinder to cylinder.
Meanwhile, out of the debris from the Dallas tank explosions came a survivor.
A pit-bull mix named "Hombre" is the only one of three guard dogs to survive the fiery accident.