Large flying rocks could fall over a two-mile (3 km) radius.
A volcano in southern Japan, Mount Io, erupted for the first time since 1768 on Thursday, spewing steam and ash 400 meters (1,300 feet) into the air.
Authorities warned locals not to approach the mountain.
“There is a possibility that the mountain will become more active,” said Makoto Saito, an official from the Japan Meteorological Agency (JMA), confirming the eruption, warning that large flying rocks could fall over a two-mile (3 km) radius.
There were no immediate reports of injuries,
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