A utility worker inadvertently poked a hole in a gas line in Springfield , Massachusetts . The resulting explosion caused the pipe to rupture and sent flames shooting into the air for several minutes before firefighters extinguished it by pumping water through it. Markings on the sidewalk incorrectly indicated where the line was . At least 21 people were injured in the blast , including firefighters .
A utility worker inadvertently poked a hole in a gas line in Springfield , Massachusetts . Fire marshal : Markings on the sidewalk incorrectly indicated where the line was . At least 21 people were injured in the blast , including firefighters .