International airlines cancelled flights into Indonesia’s capital yesterday after a volcano hundreds of miles to the west unleashed its most powerful eruption in a century, incinerating villagers as they fled a searing gas cloud.

The number of people killed by Mount Merapi in the past two weeks has now climbed to 138, as a tiny hospital at the foot of the mountain struggled to cope with survivors – some of whom have burns on up to 95 per cent of their bodies.

Indonesia’s most volatile mountain unleashed a surge of searing gas, rocks and debris last Friday that raced down its slopes at high speed, mowing down the slope-side village of Bronggang and leaving a trail of death and destruction in its path.

It continued to rumble yesterday, at times spitting ash up to eight kilometres in the air, dusting windshields, rooftops and leaves on trees hundreds of kilometres to the west.

Just days before US President Barack Obama’s visit to Indonesia, international carriers cancelled flights to the capital Jakarta over concerns about the volcano 450 kilometres away.

“The volcanic ash presence in the airways surrounding Jakarta could cause severe damage to our aircraft and engines, which could impair the safety of our operations including passengers and crew,” said Azharuddin Osman, director of operations for Malaysia Airlines.

Among the other carriers temporarily suspending flights were Singapore Airlines, Cathay Pacific, Japan Airlines, Lufthansa, Malaysia Airlines and Air Asia. Domestic flights were unaffected.

The eruption of Iceland’s Eyjafjallajokul volcano in April forced the closure of most European airports for a week and led to the cancellation of more than 100,000 flights.

The Indonesian government, meanwhile, has expanded a ‘danger zone’ to a ring 19 kilometres from the peak, bringing it to the edge of the ancient royal capital of Yogyakarta, which has been put on its highest alert.

The biggest threat is the Code River, which flows into the city of 400,000 from the 3,000-metre mountain and could act as a conduit for deadly volcanic mudflows that form in heavy rains.

Racing at speeds of 97 kph, the molten lava, rocks and other debris can destroy everything in their path. People living near the river’s banks have been advised to stay away.

Sigit Priohutomo, a senior hospital official, said the mountain has killed 138 in the past two weeks.

At least 94 of those died yesterday, Merapi’s deadliest day in decades.

More than 200 others were injured with burns, respiratory problems, broken bones and cuts, leaving the tiny hospital of Sardjito overwhelmed.

It has the only burn unit in town – with only nine beds. And with nearby airports closed because of poor visibility, extra ventilators intended for burns victims could not be flown in, said Dr Ishandono Dahlan.

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