The death of a woman at a central Whanganui property on Monday morning is being treated as "unexplained".
A police spokesperson said police were called to a Harrison St property around 9.15am following reports of a person being injured.
A St John spokesperson said one rapid response vehicle and two ambulances responded to the incident.
St John treated the woman and transported her to Whanganui Hospital in a critical condition.
Police said she died on the way to hospital.