The death toll from the devastating earthquake in Turkey and Syria is likely to more than double, a UN aid chief has told Sky News.

At least 24,596 people have been confirmed dead after the 7.8 magnitude earthquake struck on Monday, with multiple aftershocks.

Speaking to Sky’s Kay Burley in the quake-hit city of Adana in Turkey, Martin Griffiths said he expected tens of thousands more deaths.

Quake is region’s ‘worst event in 100 years’; death toll nears 25,000 | Turkey-Syria latest

“I think it is difficult to estimate precisely as we need to get under the rubble but I’m sure it will double or more,” said Mr Griffiths, the UN’s emergency relief co-ordinator.

“That’s terrifying. This is nature striking back in a really harsh way.”

He added: “It’s deeply shocking… the idea that these mountains of rubble still hold people, some of them still alive.

“We haven’t really begun to count the number of dead.”

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Facing the earthquake aftermath alone

With hopes fading for those trapped under wreckage in Turkey and Syria, Mr Griffiths said rescue efforts were now in their final stages.

“They say 72 hours is the golden period (for rescues),” he said.

“But just now they have pulled out someone alive an hour two ago. It must be incredibly difficult to decide when to stop this rescue phase.”