Three Pittsburg women who perished in a two-alarm fire over the weekend were identified on Tuesday by the Contra Costa Coroner's Office.
Ana Gonzalez, 77, Sandra Gonzalez, 51, and Maritza Mena, 49, died early Sunday in the single-story home in the 200 block of DiMaggio Avenue in Pittsburg, according to Fire Inspector Steve Aubert, of the Contra Costa Fire District.
Ana and Sandra Gonzalez were mother and daughter and Mena was related to them as a cousin or niece, a coroner's deputy said. The cause of death for all three was smoke inhalation, officials said.
Investigators found three smoke detectors on a countertop after the fire was extinguished, Aubert said. None of the detectors were functioning, nor did they have batteries.
"That's the tragic part of it," Aubert said. "Here you have something that's so simple, something so easy to use."
Investigators still have not determined what caused the house to burn, Aubert said. Crews knocked down the fire, which began around 12:30 a.m., in about 25 minutes.
A neighboring home had some exterior damage, but the resident of that home, Mary Lou Oliver escaped with her pet Chihuahua dog.
Paul Burgarino contributed to this story. Contact Rick Hurd at 925-945-4789 and follow him at Twitter.com/3rdERH.