Chico Fire Officials tonight are calling Friday's house fire on York Avenue "suspicious."
Fire Inspector Marie Fickert says the blaze was human caused. Investigators are not releasing specifics, but say they have not ruled out an accidental cause by one of the two girls at the home.
Their mother has been arrested for child endangerment, for allegedly leaving the girls ... Ages 8 and 9 ... home alone .
One was in the house when the fire started and one was sleeping outside in a car.
They ran to a neighbors, and called 9-1-1 ... thinking their mother was still in the house.
39-year old Rebecca Morales is charged with child endangerment, her children were taken into protective custody.