BEIJING, China (CNN) -- New video from China suggests that security forces have yet to gain complete control of Tibet and neighboring provinces which have suffered eruptions of anti-Chinese violence since last week.Film of a crowd -- some on horseback -- attempting to storm a government building has been shot by a Canadian television crew that managed to gain access to a Chinese town in Gansu province despite attempts by Chinese authorities to keep foreign media away from the region.On Thursday, China acknowledged for the first time that anti-government riots that rocked Tibet last week have spread to other provinces, The Associated Press reported.Also on Thursday, an international human rights group urged Nepal to stop doing Beijing's bidding and end its crackdown on Tibetan exiles protesting against China, AP reported. New York-based Human Rights Watch said Nepal "should cease arbitrary arrests and detentions, harassment, and the use of excessive force to silence Tibetan protesters,

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