INDIANAPOLIS (AP) – Investigators have increased the damage estimate from the deadly Indianapolis neighborhood explosion by about one-fifth to $4.4 million.

Fire Capt. Rita Burris said Friday that damage estimate was increased from the previous $3.6 million figure after inspectors were able to check out more of the properties in the subdivision on the city’s south side.

Officials say 32 houses have been deemed unsafe from Saturday night’s explosion, with five destroyed and 10 with major damage. Burris says city inspectors might order the demolition of up to 10 houses and that insurance companies might have others torn down.

Burris says some 30 investigators continue working to determine what caused the explosion and that heavy equipment was being brought in to help move debris.