A hip-hop star in military-ruled Myanmar has been jailed for six years for being part of a political group, the latest in a string of hefty sentences handed down on dissidents, an opposition spokesman said on Friday.

A member of the popular band "ACID," was among 20 activists sentenced to lengthy prison terms Thursday, Nyan Win, spokesman for the National League for Democracy (NLD), told Reuters.

He had been part of a youth political movement called Generation Wave that sprung to life around the time of last year's protests against soaring food and fuel prices and decades of repressive military rule.

Five other Generation Wave members were jailed for five years, Nyan Win said, adding that 14 NLD members arrested in June for holding a march on the birthday of detained party leader Aung San Suu Kyi had been sentenced to up to 2- years.

The sentences are the latest in a wave of convictions handed down in the last month against more than 100 people from across the spectrum of the former Burma's dissident underground.

The most prominent activists have been sentenced to 65 years in prison and dispatched to the furthest corners of the southeast Asian nation's gulag, making it almost impossible for family members to deliver food and medicine.

Those jailed include about 20 women and Buddhist monks.

The United States and European countries have condemned the junta's closed door trials and sentences, although there has been little comment from countries in the region.