The cause of a fire that killed four children at a house in Lake Ozarks yesterday (Thursday) is still unknown.

The children were ages 14, 8, 5, and 4.

Two parents lived in the single story home and had left the children alone.

Firefighters went to the call just before 1 yesterday (Thursday) morning.

Four children and two pets were found dead inside by firefighters.

The house was a total loss and investigators are trying to determine what caused the fire.