ROCHESTER, N.Y. — Authorities say a Rochester woman mauled by a pit bull earlier in the week has had one of her arms amputated.

Rochester police have confirmed that surgeons amputated part of 33-year-old Mariah Schaffer’s arm because of injuries she sustained during the attack early Wednesday morning.

Officers responded to her boyfriend’s home after receiving a report of a woman being attacked by a dog. When officers arrived, they found Schaffer naked and being mauled by a pit bull at the end of the driveway.

Police say three officers shot and killed the dog.

Schaffer remains in critical condition at Strong Memorial Hospital.

Schaffer’s boyfriend, the dog’s owner, was hit by a stray bullet. He remains hospitalized but is expected to recover.

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