PLEASANTON (CBS SF) — A mother and her 13-year-old daughter were found shot to death in their home in Pleasanton Monday evening, police said.

Police responded to a 911 call reporting a shooting around 6 p.m. at the home at 3532 Stacey Court.

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When police arrived, they found Amy Freeman Burton, 37, dead from a gunshot wound.

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Her daughter, Ainsly Freeman, was also found shot and was transported to Eden Medical Center. She later succumbed to her injuries.

Investigators wouldn’t say if it was being investigated as a murder-suicide or a double murder.

No further information about the circumstances of their deaths was immediately available. Police say the father is not a suspect, but is a ‘person of interest.’

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Anyone with information about the shooting has been asked to call Pleasanton police at (925) 931-5100.