(CNN) New Zealand police have ended the search for two remaining victims still missing after a deadly volcanic eruption on New Zealand's White Island, also known as Whakaari.

Australian tourist Winona Langford, 17, and New Zealander Hayden Marshall-Inman, 40, who was a tour guide, were unaccounted for following the eruption and believed dead.

"The search for the two missing victims of the Whakaari / White Island eruption has been suspended," Bay of Plenty District Commander, Superintendent Andy McGregor said in a statement on Tuesday.

The decision was made after dive and helicopter teams had carried out "extensive shoreline and substantial aerial searches" but "sadly no further items of significance have been located," McGregor said.

Police believe their bodies could have washed out to sea and may never be found.

Hayden Marshall-Inman worked as a tour guide to New Zealand's White Island.

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