About 20 people held a candle-light vigil last night outside the central government's liaison office to mark the riots in Tibet two years ago. A scuffle broke out when several activists tried to hang a banner and a snow lion flag - a symbol of the Tibetan independence movement - on the office's front gate. Police officers guarding the gate threatened to use pepper spray as the activists - including Christina Chan Hau-man, one of the organisers of the vigil - tried to push their way forward. One person was slightly injured, the group said. Chan, a prominent student activist, was arrested in January over the alleged assault of a policewoman during a pro-democracy protest on New Year's Day outside the liaison office. She is on bail. Last night the group was marking events in Tibet. In March 1959, a failed revolt by Tibetans against Beijing rule led to the Dalai Lama's exile. On the anniversary of the uprising two years ago, a riot started in Lhasa on March 14 and spread to Tibetan-populated areas in Sichuan , Qinghai and Gansu .
