Officer said the male pit bull attacked a 37-year old woman who was visiting a friend at a home at 4305 Presley Court at about 5 p.m.
According to police, the dog bit her in the leg, chest and abdomen before she was able to lock herself in a bathroom until help arrived.
Neighbors said they attempted to help when they found out the woman was in trouble.
"We tried to come over there with out little weapons or whatever thinking we could do something, but the dog was so angry and it was trying to get through the door because she was trapped in the bathroom," said Tony Morgan.
The woman who was attacked was discharged from the hospital.
The dog is at the Wake County Animal Shelter, police said.