This aerial photo shows White Island after its volcanic eruption in New Zealand Monday, Dec. 9, 2019. The volcano on a small New Zealand island frequented by tourists erupted Monday, and a number of people were missing and injured after the blast. (George Novak/New Zealand Herald via AP)

WELLINGTON — A volcano on a small New Zealand island frequented by tourists erupted with a large plume of ash and steam Monday, killing one person and leaving others injured or missing.

Prime Minister Jacinda Ardern said about dozens of tourists were on or near White Island when it erupted in the afternoon. Police later said one person had been confirmed killed.

Ardern said at an afternoon news briefing that people who were injured in the eruption were being transported to shore. She said the incident appeared to be “very significant.

“All our thoughts are with those affected,” she said.

St John medical responders said earlier they believed there were 20 people on the island who were injured and in need of medical treatment.