Fate of Drugkho, the 155th confirmed self-immolation in Tibet since 2008, is unknown as Chinese police clamp down on Ngaba County.
Three youth activists joined a demonstration in April demanding help for thousands of people trapped in Kachin state war zone.
Political prisoners are never amnestied, as their crimes are considered more serious than other offenses, Lao sources say.
Government spokesman says program to repatriate Rohingya from Bangladesh still on track.
