London, June 29 -- The younger son of Myanmar's incarcerated pro-democracy leader Aung San Suu Kyi has demanded the country's military-led government furnish concrete proof that she is alive, casting severe doubt on junta claims made in April that her sentence was commuted to around 17 years alongside a transfer to house arrest.

Expressing deep scepticism during an interview with Kyodo News this week in London, where he resides, Kim Aris stated that he believes his octogenarian mother remains confined within a prison facility in the capital, Naypyitaw, rather than a residential setting.

He pointed out that there hasn't been "any evidence" of such a relocation.

"The only news that we hear about her health is that it's getting worse," he...