The incident occurred Tuesday morning just after 3 a.m. on Pitkin Avenue in the Brownsville section of Brooklyn.
Authorities say a man and woman were in the middle of a fight when the female victim attempted to break it up.
They say the 37-year-old woman was stabbed twice in the face and six times in the body.
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EMS responded to the location and transported the victim to Kings County Hospital where she was pronounced dead.
No arrests have been made, investigation ongoing.
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