Amid mounting violence, Southeast Asian leaders and foreign ministers are set to hold talks on the Myanmar crisis in Jakarta on Saturday.

Coup leader Min Aung Hlaing's expected involvement in the summit has angered activists and human rights groups.

"Min Aung Hlaing, who faces international sanctions for his role in military atrocities and the brutal crackdown on pro-democracy protesters, should not be welcomed at an intergovernmental gathering to address a crisis he created," said Human Rights Watch's Brad Adams.

Overnight, authorities released freelance video journalist Ko Latt, who had been held in custody for a month in the capital Naypyidaw.

At least 70 reporters have been arrested since the coup and 38 are in detention, according to Reporting ASEAN.

Pro-democracy demonstrators donned blue shirts across Myanmar cities and towns on Wednesday in a united call to release all political prisoners.

Inmates in Myanmar prisons wear blue shirts.

"I want all those who were arrested for protesting for the truth to be released," one Yangon doctor participating in the blue shirt protest told AFP.

AFP