PINOLE (CBS SF) — A woman was attacked by her own pit bull in Pinole Sunday, leaving her with serious injuries.

The fire department responded to reports of a pit bull attacking a woman at a home on Silverado Drive in Pinole just before 10 a.m. Sunday, and found a 40-year-old woman suffering serious injuries to her face, arms, and legs.

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A medical helicopter transported the woman to John Muir Trauma Center in Walnut Creek.

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A second ambulance transported another resident of the home, but it was unclear if their injuries were suffered in the attack.

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Pinole police officers secured the dog and took it into custody.