New Zealand police have formally identified more Australian victims of the White Island volcano explosion.

Zoe Hosking, 15, and her stepfather Gavin Dallow, 53, both from Adelaide, Karla Mathews, 32, from Coffs Harbor and Anthony Langford, 51, from Sydney have been confirmed dead.

Two teenage boys who were earlier confirmed dead by Knox Grammar School have been formally identified by New Zealand Police.

Matthew, who was in Year 8, and Berend, who was in Year 10, were holidaying in New Zealand with their parents Martin and Barbara, who remain unaccounted for.

NZ police said the boys were US citizens with permanent residency in Australia.

Police have also confirmed a further person who was injured, and later repatriated to Australia, died yesterday.

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