A 13-year-old boy's credited for saving his mother and two sisters, after their south Oklahoma City house caught fire Tuesday morning. Eric Esparza saw the fire, and began yelling. "I heard this loud bang," 20-year-old Azucena Esparza said. "I didn't think it was something in the house, I thought it was outside." Eric and Azucena escaped the burning house safely, along with sister Abigail and mom Teresa Esparza. Teresa's husband, Jaime Esparza, was not home when the fire happened. The cause of the fire at the house in the 2500 block of Southwest 35th Street is under investigation. The Esparzas say they think it ignited in the kicthen.