A powerful 7.7-magnitude earthquake has struck Myanmar, with tremors felt across Thailand, leaving thousands feared dead.

Jack Brownth captured the terrifying moment a building collapsed onto the Bangkok streets and Sebastian Wolff showed the panicked evacuation of workers from high rise buildings.

In Bangkok, a 30-story skyscraper collapsed, killing two and trapping at least 43.

In Mandalay, Myanmar, a mosque was destroyed, killing 10 worshippers, while over 20 children are feared trapped in a school in Taungoo.

The US Geological Survey has issued a red alert, warning of widespread damage and casualties.

Electricity and internet have been cut in several regions, with major damage reported across multiple cities.