Published: Sep 12, 2010 8:05 PM EDT
Updated: Sep 12, 2010 5:05 PM EDT

SAN BRUNO, Calif. (AP) - In San Bruno, Calif., at the scene of a big gas explosion, most evacuated residents who still have homes to go back to are being allowed to return today. The official death toll from Thursday's pipeline blast and resulting fire stands at four. Five people are reported missing.
      
Meanwhile, a California utility spokesman confirms the section of pipe near San Francisco categorized as high-risk in company documents was on the same line as the segment that exploded in a deadly fireball over a suburban neighborhood.
      
Documents obtained by The Associated Press showed that Pacific Gas & Electric submitted paperwork to regulators that said a section of the same gas line was within "the top 100 highest risk line sections" in the utility's service territory.
      
PG&E spokesman Andrew Souvall did not immediately say whether records showed any complaints from San Bruno residents in the days leading up the blast, or when the section that ruptured had last been inspected. But he said the segment farther north was checked for leaks on September 10 and none were found.