Authorities in China have launched a major security operation to try to end a wave of unrest caused by Tibetan campaigners. More than 21 people are reported to have publicly set themselves on fire - five in the past week.
Sichuan province, bordering Tibet, is where most of the trouble has happened.
At least 21 people are reported to have publicly set themselves on fire, five in the past week alone, in a campaign calling for more freedom for Tibetans.
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