John Dion and Jennifer Longworth (photo from Facebook/Greenwood Schools)

Hundreds gathered Sunday night to mourn the loss of a Greenwood teacher and her husband who school employees said were killed in a blast that leveled two homes and damaged up to two dozen more on Indianapolis' south side.

Jennifer Longworth, a teacher at Southwest Elementary School, and her husband, John Dion Longworth, died Saturday night after an explosion at a home in the 8400 block of Fieldfare Way in the Richmond Hill subdivision, near Sherman Drive between County Line Road and Stop 11 Road, teachers and the school's secretary said.

Eight others were injured in the blast and ensuing fire, which displaced at least 200 people.

A man identified by teachers as Longworth's brother attended Sunday night's vigil, crying along with staff members, parents and students.

Greenwood Schools Superintendent David Edds said the district's schools will open two hours late Monday so staff can prepare for how they will talk to students about what happened.

Authorities have not said what they believe caused the explosion. The Bureau of Alcohol, Tobacco, Firearms and Explosives was called in to help with the investigation.

MORE FROM WIBC NEWS:
» Couple Feels Fortunate to Escape South Side Explosion (11-11-12)
» Damage from South Side Explosion Estimated at $3.6 Million (11-11-12)
» Explosion Kills Two in South Side Neighborhood (11-11-12)