PACIFICA (CBS SF) –- A pregnant Pacifica woman died following a mauling by her dog at her home Thursday, police said.

Pacifica police officers found an unresponsive 32-year-old Darla Napora lying in the front room not breathing when they responded to a home in the 500 block of Reina Del Mar Avenue shortly after 12:15 p.m.

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The victim’s husband had come home from work and found their 2-year-old male pit bull hovering over his wife’s body.

Officers began performing CPR before Pacifica Fire Department and San Mateo County paramedics arrived and pronounced her dead at the scene.

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As the woman was being treated, the pit bull escaped from the backyard and approached the first responders, police said. Officers shot and killed the dog.

There was a second dog in the backyard, and it and the deceased dog were taken to the Peninsula Humane Society for examination.

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An autopsy for the woman and a necropsy for the dog are scheduled for Friday.