Hopes of finding survivors dwindle as quake death toll tops 20,000

Before dawn in Gaziantep, near the epicentre of the quake, rescuers pulled Adnan Muhammed Korkut from the basement where had been trapped since the tremor struck on Monday

Rescuers and mother surround Adnan Mohammet Korkut after he was rescued in Gaziantep, southern Turkey (IHA via AP)

A teenager has been pulled largely unscathed from beneath the rubble of a collapsed building in the Turkish city of Gaziantep – but the chances of finding many more survivors four days after a catastrophic earthquake killed tens of thousands are shrinking fast.

The 7.8 magnitude earthquake hit the border region between Turkey and Syria, an area with a population of 13.5 million, killing more than 20,000 people.