INDIANAPOLIS (AP) — The house explosion in Indianapolis that killed two people and left a neighborhood in ruins was not an accident, a prosecutor said Tuesday.

Marion County Prosecutor Terry Curry told The Associated Press that city arson investigators and the Bureau of Alcohol, Tobacco, Firearms and Explosives had concluded the Nov. 10 blast, which also destroyed five homes and damaged dozens more, was not an accident.

Officials announced Monday that the probe was a criminal homicide investigation.