Shelves toppled over as a powerful earthquake shook a phone shop in Myanmar.

CCTV footage shows the dramatic moment quake struck, causing display cases to crash down on a clerk at a cellphone store in Mandalay, on March 28.

Terrified customers crouched as boxes of phones spilled from the shelves.

The US Geological Survey said the magnitude 7.7 tremor struck at a depth of 10 kilometres (six miles), and was centred in Myanmar, around 50 kilometres (30 miles) east of Monywa, along the Sagaing fault.

Residents ran from their homes when they felt the tremors shortly after 1:20 pm local time on March 28. More than 2,700 people in the country have been killed and some 4,500 injured, with the figures expected to rise.

The quake destroyed buildings, bridges, and dams, leaving many areas in ruins. Communication remains difficult as mobile networks are down, and access to electricity and the internet is limited.

In neighbouring Thailand, high-rise buildings shook and an apartment block under construction collapsed in Bangkok. The Bangkok Metropolitan Administration said at least 22 people were killed in Bangkok.