YANGON - A MYANMNAR court has jailed a student activist for 104 years, while the ruling junta freed six people who campaigned for the release of pro-democracy icon Aung San Suu Kyi, officials said Thursday.

Student activist Bo Min Yu Ko, who is in his 20s, was sentenced at a court in the central city of Mandalay in the past week, the latest in a wave of stiff prison terms handed down in the military-ruled nation in recent months.

'He was sentenced for his political activities as he went to the border (with Thailand) to contact an exile group,' a Myanmar official told AFP on condition of anonymity.

'He was also charged with some other cases related to his political movement,' the official added, without giving further details on Bo Min Yu Ko or the cases against him.

Separately authorities Wednesday freed six out of nine members of Aung San Suu Kyi's National League for Democracy (NLD) who were arrested last month near the people's parliament in Yangon during a march calling for her freedom.

Myanmar's military rulers have kept 63-year-old Nobel Peace Laureate Aung San Suu Kyi under house arrest in Yangon for most of the past 19 years. She currently has an appeal pending against her detention.

'Six people out of nine were released from the detention centre yesterday.

But the only woman, Htet Htet Oo Wai, and two men are still in detention,' said another official who did not want to be named.

Another official said the three might face legal charges for their activities.

Htet Htet Oo Wai, in her 40s, wrote a letter in December to junta leader Senior General Than Shwe and the home affairs minister asking for permission to march to Aung San Suu Kyi's lakeside house to pay her respects.

She never received a reply but authorities have been watching her group's activities since then, NLD sources said.

'I have not met the released people yet, but I also heard the information.

Htet Htet Oo Wai was not among those released,' Nyan Win, an NLD spokesman, told AFP.

About 270 activists including monks, student leaders and NLD members have been handed long jail terms in recent weeks for their roles in anti-junta protests last year and for helping victims of Cyclone Nargis in May.

Myanmar has been ruled by the military since 1962.

Aung San Suu Kyi's party won a landslide victory in 1990 elections but the junta never allowed them to take office. -- AFP