DALLAS -- Three people have died following a gas leak inside a home in southeast Dallas Wednesday night.

They've been identified as 89-year-old Alejandro Rocha, his 83-year-old wife Raquel Rocha, and their 65-year-old daughter, Belinda Dandrige. A neighbor and friend of the family told WFAA that she was with them on their porch earlier Wednesday afternoon.

Raquel Rocha died one day before her 84th birthday. .

City officials say a hazardous materials team found high levels of carbon monoxide inside their home in the 7000 block of Rose Bud Drive.

Dallas police say they were asked by family members to report a welfare check at about 7:40 p.m.

The source of the gas leak has not yet been identified, but the Hazmat team has cleared the house. Police say the rest of this neighborhood is not in danger.

The cause of the leak remains under investigation. The medical examiner will determine the official cause of death.