Myanmar confirmed its first cases of coronavirus late Monday after weeks of increasing skepticism over the under-developed southeast Asian nation's claims to be free of the disease.

The country of 54 million people had been the world's largest country by population not to report a single case of the pandemic that has confined more than 1.7 billion to their homes.

With only 214 people tested by Monday evening, medical experts and rights groups have urged Myanmar to stand up and face the pending crisis.

Myanmar's health ministry late Monday confirmed a 36-year-old Myanmar man travelling back from the US and a 26-year-old Myanmar man returning from the UK had both tested positive.

"We will investigate all the people who were in close contact with these two men," the statement said.