Eleven members of the US Congress have asked Secretary of State John Kerry to raise the issue of Tibetan political prisoners with the Chinese government, the Central Tibetan Administration (CTA) said on Saturday.
They three prisoners are Khenpo Karma Tsewang, Lobsang Kunchok and Thapke Gyatso.
"We write today to express our deep concern about three Tibetan political prisoners, while noting that there are hundreds of other documented Tibetan political prisoners currently being held in Chinese prisons, " the legislators said in a letter dated March 31.
"We urge you and others at State Department, the US embassy in Beijing and the US consulate in Chengdu to raise their cases with the Chinese government, make every effort to obtain information about their whereabouts and health status, press for necessary medical treatment, and prioritize their release, " said the letter.
Those signing the letter included Micheal E. Capuano, Christopher H. Smith, James P. McGovern, James F. Sensenbrenner and Eleanor Holmes Norton.
The Dalai Lama has lived in India since fleeing his homeland Tibet in 1959. The Tibetan administration - in - exile is based here in Himachal Pradesh state.