The fire marshal also confirmed two people injured in Sunday's explosion remain in critical condition as the investigation enters the final stages.

A “substantial” propane gas leak led to a powerful explosion earlier this week that injured six people, destroyed a recently finished northwest Austin home and damaged others nearby, according to the Travis County Fire Marshal’s Office.

A "substantial propane gas leak" caused the house explosion that destroyed a northwest Austin home and damaged more than 60 neighboring properties on Sunday, fi