Yangon, Myanmar: A prominent female activist who has been on the run from Myanmar’s military authorities for more than two months was arrested Tuesday, an official said.

Su Su Nway was arrested as she was trying to place a leaflet on a building near a hotel in Yangon where visiting U.N. human rights investigator Paolo Sergio Pinheiro has been staying, said the official, who insisted on anonymity because he is not authorized to speak to the press. The contents of the leaflet were not known.

In neighboring Thailand, dissident Stanley Aung from the group National League for Democracy-Liberated Area confirmed her arrest.

Pinheiro arrived Sunday on a five-day visit to investigate human rights conditions in the wake of September’s violent crackdown by the ruling junta on peaceful pro-democracy demonstrations.

Su Su Nway was active in protests in Yangon in August against an oil price hike. She dramatically escaped arrest when pro-government thugs broke up a demonstration on Aug. 28, an event captured on video and shown on television around the world.

The September demonstrations, which attracted as many as 100,000 people at their height, grew out of the smaller August protests, which were attended by a relative handful of political activists such as Su Su Nway.

The government acknowledged detaining almost 3,000 people in connection with the protests, but says it has released most. Most of the prominent political activists who were arrested remain in custody.

After the Aug. 28 confrontation, Su Su Nway, 35, said she had a heart condition and was not fit to take part in street demonstrations, but with other prominent activists in jail, she thought it was her duty to take part.

Since then she has been in hiding, but there have been reports of her occasionally surfacing for more protest activity. She had regular contact with the media until her mobile phone was disconnected in early September.

The Democratic Voice of Burma, a Norway-based radio station run by Myanmar dissidents, reported that on Oct. 27 she laid flowers at the spot where Japanese video journalist Kenji Nagai was shot dead by government security forces while covering the demonstrations in Yangon a month earlier.

Su Su Nway served nine months in prison in 2005-2006 for her labor activism when she was convicted of defamation after she won a conviction against four officials for using forced labor.

She is also a member of detained opposition leader Aung San Suu Kyi’s National League for Democracy party.