While the depth and extent of the excavation works are still undetermined, Selangor Police Chief Hussein Omar Khan said no gas leakage was detected by pipeline-owner Petronas before the fire.
He explained that Petronas has sensors and systems in place to detect any pressure drop, which would have indicated a leak.
Based on information from the Fire and Rescue Department, he added that a gas leak on its own - without ignition - would not have caused an explosion of such magnitude.
Video source: https://www.facebook.com/PolisSelangor/videos/1333533904596468