The United Nations and Amnesty international have separately marked the 75th birthday of a jailed Burmese rights defender.
Amnesty says U Win Tin was first arrested in 1989, for his leadership position in the National League for Democracy.
Since then he has spent many years in prison and is currently serving a 20-year sentence for offenses that include speaking out about the human rights violations in Burma's prisons.
Amnesty says he is Burma's longest-serving prisoner of conscience.
The United Nations special envoy for human rights in Burma Paulo Pinheiro called for Mr. Win Tin's release and other Burmese political prisoners, especially those who are old or ill. Burma has imprisoned many political activists, including democracy leader and Nobel Peace laureate Aung San Suu Kyi.