A volcano has erupted on Whakaari/White Island with 5 people confirmed dead. According to this report:

"50 people, in total, were on the island when it erupted. 23 have since been taken to shore. But it is currently too dangerous for police and rescue to visit the island, and up to 27 people remain."

It was an active volcano - last erupted in 2016 - but i guess no specific warning for this eruption. Some dramatic footage in the link.

https://youtu.be/bzTJAsvA1fE