Former British envoy Vicky Bowman, Australian economics adviser Sean Turnell and Japanese journalist Toru Kubota "will be released to mark National Day", a senior officer said.
Myanmar has spiralled into bloody conflict since the military ousted Aung San Suu Kyi’s civilian government in February last year, with thousands killed.
The Myanmar crisis dominated the first day of a summit of the Association of Southeast Asian Nations (ASEAN) regional bloc in Phnom Penh that US President Joe Biden will join on Saturday.
ECOWAS had reached an agreement with ousted leader Lt.Col. Paul Henri Sandaogo Damiba to hold a new vote by July 2024.
Lieutenant-Colonel Paul-Henri Sandaogo Damiba "himself offered his resignation in order to avoid confrontations with serious human and material consequences", leaders said.
The 10-country ASEAN has spearheaded so far fruitless efforts to resolve the turmoil and acknowledged in a joint statement on Friday the lack of progress around a five-point crisis resolution plan.
The 10-member bloc -- spearheading so far fruitless efforts to resolve the turmoil -- issued a joint statement after foreign minister talks in Phnom Penh.
Foreign ministers from the Association of Southeast Asian Nations are discussing how to address the growing crisis in Myanmar at talks in Phnom Penh.
The Southeast Asian nation has been in turmoil since the putsch last year, with the junta accused by rights groups of committing war crimes as it struggles to crush resistance to its rule.
Sergei Lavrov's visit comes after the junta sparked renewed international outrage last week when it announced it had executed four prisoners.
Sources said criticising the junta will only push it closer to China and some upcoming Indian projects shielded by Myanmar can also be in jeopardy.
Phyo Zeya Thaw, a former lawmaker from Suu Kyi's National League for Democracy was sentenced to death in January for offences under anti-terrorism laws.
Myanmar junta executes former lawmaker, three others for allegedly leading brutal and inhumane terror acts
The Global New Light of Myanmar newspaper said," The executions were carried out under the prison's procedure without saying when or how the men were killed."
Troops torched hundreds of buildings in the villages of Kinn, Upper Kinn and Ke Taung over three days last week, locals and media reports said.
Guinea earlier this month opened a judicial investigation into Conde and several other former top officials for murder, torture, kidnappings, looting and rapes.
The Southeast Asian country has been in chaos since a putsch last February, with anti-coup "People's Defence Force" fighters clashing with junta troops across the nation.
It targeted eight members of the shadow National Unity Government, which views itself as the country's legitimate ruling authority, and three prominent activists.
All had been arrested for supporting the protest movement against last year's seizure of power by the military, which ousted the elected government of Aung San Suu Kyi.