Fire crews have put out a fire at a house located in northwest Austin early Tuesday morning.

According to the Austin Fire Department, the fire happened at 4102 Cat Mountain Drive near Mesa Drive and Ranch to Market 2222 at 4:34 a.m. AFD said someone was driving by the home and noticed the fire before calling 911.

When crews arrived, they discovered that the house was vacant. No injuries were reported in the fire.

AFD is still investigating to determine what caused the fire.