One worker died and seven were injured on Monday when digging to set power line poles punctured a natural gas pipeline, triggering an explosion, officials said...A crew building a power line for Brazos Electric Cooperative punctured a 36-inch pipeline owned by Enterprise Products, triggering a blast and fire, officials said...One energy analyst said the gas pipeline blast could feed jitters about energy supply because the BP oil spill in the Gulf of Mexico had prompted government limits on drilling. "The explosion comes at a time when uncertainty surrounds future drilling activities amid a moratorium that the government has imposed," said Phil Flynn, analyst with PFGBest Research in Chicago. [also refers to BP]