A massive explosion this week at a food dye factory in Louisville, Kentucky, left two people dead and a dozen others injured as smoke billowed out of torn metal structures and rubble.

Kentucky’s governor says investigators will find out what caused a deadly explosion that ripped apart a Louisville factory.

Dr. Jason Smith, University of Louisville Hospital's chief medical officer, said doctors who treated victims dealt with a "spectrum of injuries" consistent with an explosion, including blast injuries, thermal injuries and injuries from falling debris.