A fatal crash claimed the lives of a grandmother and two of her grandchildren as their mother watched medical personnel try to save them.

It happened on Wednesday near Highway 100 in Los Fresnos.

Dorothy Sanchez only knew 6 year old Reynaldo Alvarado and 2 year old Ariel Castillo for a short time, but they impacted each other quickly.

Her husband grew up with their mother Larissa. It was more like a family than a friendship.

On Wednesday, on what was supposed to be an exciting day, that family was torn apart.

Investigators say a blown out tire caused an SUV to slam into the family's vehicle, killing their grandmother Maria Zamora and later claiming the lives of Reynaldo and Ariel.

Watch the video for the full story.