Powerful earthquakes hit Myanmar and Thailand, killing dozens and trapping workers under the rubble of a toppled Bangkok skyscraper that was under construction.

The woman was reportedly in surgery when the tremors measured 7.7 magnitude on the Richter scale, however the doctors were forced to evacuate the hospital.

Thai workers toiled for a second day at the scene of a collapsed building in Bangkok on Saturday looking for survivors after Friday’s earthquake.

Scores of people are missing in the ruins of a high-rise building that was felled by the quake in Myanmar. Signs of life raised hopes on Saturday, but there was no update on survivors.

More than 150 people have died after a powerful earthquake hit Myanmar and rattled Thailand, but the extent of the casualties is still emerging as crews try to find people who are missing. Follow for live news updates.

An under-construction skyscraper collapsed after a strong earthquake was felt in Bangkok, trapping dozens under the rubble. The epicenter of the 7.7-magnitude earthquake was in neighboring Myanmar, but the strong tremor shook buildings in the Thai capital.

A powerful earthquake centred in Myanmar rocked Southeast Asia on Friday, killing several people and causing extensive damage, with rescuers in Bangkok searching for 81 people in the rubble of a collapsed building.

A rescuer in Myanmar tells the BBC "the damage is enormous" as the 7.7 magnitude quake is felt in neighbouring countries.