A complex rescue operation is under way in southern Turkey and northern Syria after two devastating earthquakes, on a scale unmatched in decades, killed more than 2,000 people and injured thousands more. The death toll and casualty numbers are still rising rapidly.

The first quake – of 7.8 magnitude – struck the southern-eastern Turkish city of Gaziantep, about 90km from the Syrian border, in the early hours of Monday while locals were asleep. Hours later, a 7.5-magnitude tremor hit Turkey’s Kahramanmaras province, 80 miles directly north of Gaziantep.