Indianapolis police searching for white van seen nearby before blast that destroyed five homes and damaged dozens moreThe house explosion that killed two people and destroyed several homes in an Indianapolis neighborhood is now being investigated as a homicide, authorities said, though no suspects have been named.Indianapolis homeland security director Gary Coons made the announcement Monday evening, shortly after a funeral was held for the husband and wife who had lived next door to the house where investigators believe the blast occurred."We are turning this into a criminal homicide investigation", Coons said after meeting with local residents, marking the first time investigators have acknowledged a possible criminal element to the November 10 explosion.Search warrants have been executed and officials are now looking for a white van that was seen in the subdivision on the day of the blast, Marion county prosecutor Terry Curry said.