Information received by the Tibetan Centre for Human Rights and Democracy (TCHRD) indicates that local authorities have subjected several known Tibetans including family members, relatives and eyewitnesses to arbitrary detention and severe interrogation following the self-immolation protest staged by Tashi Rabten on 8 December in Machu (Ch: Maqu) County, Kanlho (Ch: Gannan) Tibetan Autonomous Prefecture, Gansu Province, in the Tibetan province of Amdo.