Published: Nov 09, 2010 4:59 PM EST
Updated: Nov 09, 2010 1:59 PM EST

CITRA, Fla. (AP) - Family members say a space heater may have sparked a fire that killed five siblings inside their central Florida home.

Neighbors heard screaming Monday night and ran outside to see a house engulfed in flames. The children's mother, Krista Jordan, and another relative escaped through a window, but the children were trapped inside. Three brothers, ages 15, 13 and 8; and two sisters, ages 12 and 6, were killed in the blaze. Their 21-year-old aunt, Kyla Cole, was severely burned.

The Ocala Star Banner reported the fire does not appear to be suspicious, but the State Fire Marshal's Office is investigating the cause.