More than 3,400 dead after powerful earthquake hits Turkey and Syria

Rescue efforts at a collapsed building in Adana, Turkey (IHA via AP)

More than 3,400 people have died after a powerful 7.8-magnitude earthquake toppled hundreds of buildings across wide swathes of Turkey and Syria.

Hundreds of people are still believed to be trapped under rubble, and the death toll is expected to rise as rescue workers search mounds of wreckage in cities and towns across the area.