A close aide to ousted Myanmar leader Aung San Suu Kyi was detained in a new wave of arrests following last week's military coup, a party official said on Thursday, as Washington moved a step closer to imposing sanctions on the junta.

The aide, Kyaw Tint Swe, had served as minister for the office of the state counsellor under Suu Kyi, who has been detained since the Feb. 1 coup.

Kyi Toe, an information committee member of Suu Kyi's National League for Democracy (NLD), said Kyaw Tint Swe and four other people linked to the previous government had been taken from their homes overnight.

He said officials of the electoral commission had also been arrested overnight, including some down to township level, but he did not immediately have an exact number of those arrested.

The military launched the coup after what it said was widespread fraud in November elections, won by the NLD in a landslide. The electoral commission had rejected those claims.

Myanmar authorities did not immediately respond to a request for comment and Reuters was unable to confirm the arrests independently. Scores of officials have been detained since the coup.

U.S. President Joe Biden on Wednesday approved an executive order for new sanctions on those responsible for the coup, and repeated demands for the generals to give up power and free civilian leaders.

Biden said the order enabled his administration "to immediately sanction the military leaders who directed the coup, their business interests as well as close family members."

Washington would identify the first round of targets this week and was taking steps to prevent the generals in Myanmar, also known as Burma, having access to $1 billion in Myanmar government funds held in the United States.

"We're also going to impose strong exports controls. We're freezing U.S. assets that benefit the Burmese government, while maintaining our support for health care, civil society groups, and other areas that benefit the people of Burma directly," Biden said at the White House.

The Feb. 1 coup and detention of Suu Kyi presents Biden with his first major international crisis, and a test of his dual pledges to re-center human rights in foreign policy and work more closely with allies.

U.S. State Department spokesman Ned Price said Washington was rolling out collective actions with partners on Myanmar."We can impose substantial costs ourselves. We can impose costs that are even steeper ... by working with our like-minded partners and allies," he told a briefing.

ASIAN INFLUENCE

Even so, analysts say Myanmar's new junta will not be as isolated as previous iterations, with China, India, Southeast Asian neighbors and Japan unlikely to cut ties given the country's strategic importance.

Derek Mitchell, a former U.S. ambassador to Myanmar, said it was vital to get nations such as Japan, India and Singapore involved in a strong response.

"The key will not be just what America does," he said. "It’s going to be how we get others along with us, allies who may have more skin in the game, more leverage, or at least better relationships with the key players."

The United Nations' top human rights body is to consider a resolution on Friday drafted by Britain and the European Union condemning the coup and demanding urgent access for monitors.

However, diplomats said China and Russia - which both have ties to Myanmar's armed forces - are expected to raise objections or try to weaken the text. The UN Security Council issued a statement last week calling for Suu Kyi's release but stopping short of condemning the coup.

FESTIVE PROTESTS

Protests spilled into a sixth straight day on Thursday.

Hundreds of workers lined a road in the capital Naypyitaw in support of the Civil Disobedience Movement, chanting anti-junta slogans and carrying placards that read "reject military coup" and "save Myanmar". Some held up pictures of Suu Kyi with the words "we trust our leader".

After a woman was shot in violent clashes on Tuesday, protests on Wednesday took on a festive air, with bare-chested body builders, women in ball gowns and wedding dresses, farmers on tractors and people with their pets.

The protests have revived memories of almost half a century of direct army rule, punctuated with bloody army crackdowns, until the military began relinquishing some power in 2011.

Washington's sanctions are likely to target coup leader Min Aung Hlaing and other top generals who are already under U.S. sanctions imposed in 2019 over abuses against Rohingya Muslims and other minorities.

It could also target military holding companies with investments spanning sectors including banking, gems, copper, telecoms and clothing.

Suu Kyi, 75, won the 1991 Nobel Peace Prize for campaigning for democracy and remains hugely popular at home despite damage to her international reputation over the plight of the Rohingyas.

She has spent nearly 15 years under house arrest and now faces charges of illegally importing six walkie-talkies. Her lawyer says he has not been allowed to see her.