GRAND PRAIRIE (CBSDFW.COM) – An 81-year-old woman died Monday when her house caught fire.

It happened in the 200 block of NW 14th Street.

deadly house fire in Grand Prairie (Chopper11)

A fire department spokesperson says the woman’s oxygen tank may have been a factor in the fire.

Neighbors saw the smoke and called 911 around 1:45 p.m..

The caretaker for the woman, who lives alone, had just left.

deadly house fire in Grand Prairie (Chopper11)

 Authorities say they found the woman in her bedroom where the fire started.