By David MacAnally, WTHR Reporter
GREENWOOD, Indiana -- Investigators suspect a gas leak in the massive explosion that killed two people, but the exact cause is still unknown.
One of the two people killed was elementary school teacher, Jennifer Longworth. She and her husband were killed in the blast that destroyed five houses.
The deadly blast not only shook a neighborhood, it shook the community at Southwest Elementary School in Greenwood.
Students left their thoughts outside the school at a candlelight memorial.
Longworth taught at the school for twelve years.