National League for Democracy patron Win Htein has been vocal in his opposition to the coup since it was launched on February 1. Party officials have confirmed he was arrested just after midnight on February 5.
A key aide of ousted leader Daw Aung San Suu Kyi was arrested Friday, days after a coup that has sparked outrage and calls by US President Joe Biden for the generals to relinquish power.
The arrest follows that of Aung San Suu Kyi and Myanmar president Win Myint, who were detained on Monday as the military seized the levers of government, granting army chief Min Aung Hlaing control of the country.
The move ended Myanmar’s 10-year dalliance with democracy after decades of junta rule.
Aung San Suu Kyi’s National League for Democracy said through a verified Facebook page that party stalwart Win Htein had left Nay Pyi Taw on Thursday afternoon and gone to Yangon.
“He was arrested from his daughter’s house where he was staying at midnight [in Yangon],” party press officer Kyi Toe said, adding he was being held in a Nay Pyi Taw police station.
The 79-year-old is a longtime political prisoner, who has spent long stretches of time in and out of detention for campaigning against military rule.
Considered Aung San Suu Kyi’s right-hand man, he has long been sought out by international and domestic media for insights into what Myanmar’s de facto leader is thinking.
Ahead of his arrest, he had told local English-language media that the military putsch was “not wise”, and that its leaders “have taken [the country] in the wrong direction”.
“Everyone in the country should oppose as much as they can the actions they are seeking to take us back to zero by destroying our government,” he told Frontier in the coup’s aftermath.
Aung San Suu Kyi has not been seen in public since Monday.
According to the Assistance Association for Political Prisoners, a Yangon-based group that monitors political arrests in Myanmar, more than 130 officials and lawmakers have been detained in relation to the coup.
Telecoms providers in the country have also been ordered to throttle Facebook, the main means of accessing the internet and communicating for millions of people in Myanmar.
The putsch has drawn condemnation globally and on Thursday, US President Joe Biden reiterated his call for the generals to reverse course.
“The Burmese military should relinquish power they have seized, release the advocates and activists and officials they have detained, lift the restrictions in telecommunications, and refrain from violence,” Biden said.
He spoke hours after his national security adviser Jake Sullivan said the White House was “looking at specific targeted sanctions both on individuals and on entities controlled by the military that enrich the military.” He did not give further details.
So far, no large-scale protests have emerged on the streets of Myanmar, though small pockets of dissent have popped up, with medical doctors choosing to wear reb ribbons – the NLD’s colour.