Bangkok: The death toll from a major earthquake in Myanmar has risen to 1,644, the ruling junta said Saturday, with 3,408 people injured.

A statement from the junta's information team said that at least 139 people are still missing after Friday's shallow 7.7-magnitude quake.

Myanmar, also known as Burma, is in the throes of a prolonged civil war, which is already responsible for a humanitarian crisis. It makes movement around the country both difficult and dangerous, complicating relief efforts and raising fears that the death toll could still rise precipitously.

The earthquake struck midday Friday with an epicentre not far from Mandalay, followed by several aftershocks, including one measuring 6.4. It sent buildings in many areas toppling to the ground, buckled roads, caused bridges to collapse and burst a dam.

In the capital, Naypyidaw, crews worked Saturday to repair damaged roads, while electricity, phone and internet services remained down for most of the city. The earthquake brought down many buildings, including multiple units that housed government civil servants, but that section of the city was blocked off by authorities on Saturday. AP