The death toll from a major earthquake in eastern Afghanistan passed 1,400 on Tuesday, with more than 3,000 people injured, Zabihullah Mujahid, a Taliban government spokesman, said on social platform X.

Rescuers are scrambling in a "race against time" to reach the mountainous and remote area devastated by Sunday's powerful 6.0 magnitude earthquake, a UN official said, warning of an exponential rise in the number of casualties.

The quake struck in several provinces, causing extensive damage. It flattened villages and trapped people under the rubble of homes that were constructed mostly of mud bricks and wood and were unable to withstand the shock. Rough terrain is hampering rescue and relief efforts.