Cambodian Foreign Minister Prak Sokhonn is due to make his third visit to Myanmar next month but said it would be reconsidered if more political prisoners are executed.
Hunger strikes have begun in Obo Prison, Mandalay, to honor the four executed pro-democracy activists.
It is feared more political prisoners will be executed by the regime.
Cambodian PM Hun Sen said the situation in Myanmar was now worse than before the bloc issued its peace plan for the country.
As the regime plans to execute more political prisoners, Ma Nilar Thein says she does not want others to suffer her husband’s fate.
Also this week, the UN offered more toothless condemnation of the junta, and pro-regime thugs stoned the homes of relatives of the four executed activists.
How many brave souls must follow Ko Jimmy, Ko Phyo Zeya Thaw, Ko Hla Myo Aung and Ko Aung Thura Zaw to the gallows before Myanmar is rid of the traitor Min Aung Hlaing?
Resistance groups and ethnic armed organizations unite to condemn the hangings and insist on justice for those responsible.
The demonstration in Yangon was joined by pro-regime mobs, members of the junta-proxy Union Solidarity and Development Party, and Buddhist nationalists including monks.
Berlin condemned the recent executions of four activists and called on Myanmar to reinstate a moratorium on use of the death penalty "and end violence and repression".
After the executions of four activists, no one can doubt the regime’s willingness to kill the remaining detainees on death row soon; we must act now to save them.
The homes of the executed men and their families have been stoned by pro-junta mobs; relatives have been detained and told not to hold funerals by local officials.
In an unprecedented joint statement issued after four activists were hanged, the civilian govt, NLD and ethnic armed groups said they would unite to defeat the junta.
The regime responded angrily to international condemnation of the executions, including from regional bloc ASEAN.
Enjoying impunity at home and indifference from abroad, Min Aung Hlaing is living up to his boast that there is ‘nothing’ he ‘dare not do’.