Fire crews in Starr County are trying to determine the cause of an early morning house fire.

The blaze broke out around 3:00 am today at a home on 124 Peterson Drive in Rio Grande City.

Crews from the La Rosita fire department responded to the fire and upon arrival, they found the home fully engulfed in flames.

We’re told the residence was a mobile home what was renovated about a year ago. At this point, the cause of the blaze remains unknown.