Employees Seriously Injured in Sport Chalet Explosion

Two employees suffered second- and third-degree burns after an explosion inside a Sport Chalet’s utility room Friday morning. The flash-flame explosion is believed to have been caused by a buildup of natural gas, but investigators are still trying to determine the cause of the leak. Patrick Healy reports from La Cañada for the NBC4 News at 5 p.m. on March 1, 2013.