Crews fighting house fire in Northwest Austin

AUSTIN (KXAN) — Crews are trying to put out a house fire in Northwest Austin.
The fire started around 4:30 a.m. on Cat Mountain Drive near Mesa Drive, west of MoPac. When firefighters arrived they saw flames coming out of the house.
There was no one in the home at the time of the fire, according to Austin police. There is no word on what started the fire.
Austin Police are helping the Austin Fire Department contain the fire.
Three blocks of Cat Mountain Drive are closed surroundi