New Zealand's Mount Tongariro erupts
21 November 2012 Last updated at 10:23 GMT
A volcano has erupted on New Zealand's North Island, sending a column of ash high into the atmosphere.
The official (GNS Science) monitoring service issued a potential threat alert after Mount Tongariro started spewing smoke and steam.
There are no immediate reports of damage. It is the second eruption of the mountain this year.