The junta alleges the suspects killed 15 people with regime ties starting last July on the orders of ex-NLD lawmaker U Wai Phyo Han, who is not in custody.
Among those released were Victoria Bowman, the former diplomat, and Sean Turnell, an Australian economic adviser to Myanmar’s imprisoned civilian leader, Daw Aung San Suu Kyi.
A military-run court in Burma has sentenced jailed pro-democracy leader Aung San Suu Kyi to six more years in prison after convicting her on four additional counts of corruption.