"Police can confirm a further person has died in Middlemore Hospital last night … police were advised of the death shortly before 11pm," said Police Deputy Commissioner John Tims in a statement.
Police did not provide any details on the identity or nationality of the person. The majority of the previously named victims after the powerful eruption of White Island, also known by its Māori name of Whakaari, were Australian citizens or permanent residents.
Those still missing, presumed dead, are Winona Langford, a 17-year-old Australian, and Hayden Marshall-Inman, a 40-year-old New Zealand tour guide. Their bodies are believed to have been washed out to sea.