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More than 31 feared dead after Japanese eruption

More than 30 hikers were found in "cardiac arrest" near the peak of an erupting volcano in Japan
More than 30 hikers were found in "cardiac arrest" near the peak of an erupting volcano in Japan

Thirty-one people are presumed dead near the peak of a Japanese volcano that erupted earlier, catching hundreds of hikers unawares as it belched out clouds of rock and ash.

The deaths on Mount Ontake, 200km west of Tokyo, were the first from a Japanese volcanic eruption since 1991.

Police said the 31 were found in "cardio-pulmonary arrest", but declined to confirm their deaths pending a formal examination, as per Japanese custom.

Public broadcaster NHK and the Kyodo news agency later reported that four, all men, had been confirmed dead.

An official in the area said rescue efforts had been called off due to rising levels of toxic gas near the peak, as well as approaching nightfall.

Hundreds of people, including children, were stranded on the mountain, a popular hiking site, after it erupted without warning yesterday, sending ash pouring down the slope for more than 3km.

Most made their way down later yesterday but about 40 spent the night near the 3,067 metre peak.

Some wrapped themselves in blankets and huddled in the basement of buildings.

"The roof on the mountain lodge was destroyed by falling rock, so we had to take refuge below the building," one told NHK national television. "That's how bad it was."

More than 40 people were injured, several with broken bones.

Earlier, the Fire and Disaster Management Agency had said authorities were trying to confirm the whereabouts of 45 people.

It was not clear whether those 45 included the 31 people found in cardio-pulmonary arrest.

The volcano was still erupting today, pouring smoke and ash hundreds of metres into the sky.

Ash was found on cars as far as 80 km away.