United Nations mandate holders have published a joint communication they sent to China last December about the cases of three Tibetans whose treatment is in contravention of their human rights. They have had no response concerning two cases which have attracted worldwide attention, those of Tibetan language rights advocate Tashi Wangchuk, and Dolkar Lhamo and Nyima Lhamo – relatives of Tenzin Delek Rinpoche who died in prison last year.