Tibetan protesters have pulled down a Chinese flag, put up posters calling for independence , and shouted slogans at police, defying a security clampdown following a spate of deadly protests against Beijing’s rule.More than a dozen Tibetans were also detained this week, adding to more than 100 who were picked up immediately following bloody protests two weeks ago that left up to six people dead.On Saturday, Tibetans in Wonpo town, in Sershul county, pulled down the Chinese national flag from a school.A day later, Chinese police detained four Tibetans after they shouted slogans in front of a police station in the Khangmar village of Dzatoe county.

“Local police immediately detained them and took them to Tridu [in Chinese, Chenduo] county,” a source said. “Their condition is unknown.”

The source identified the men as Tsering Palden, Tsering Sangpo, Tsering Tashi, and Dorjee—all believed to be in their 20s or 30s.

Chinese forces had set up checkpoints and tightened security across Dzatoe and in nearby Kyegudo.

Leaflets calling for independence and for the return of the Dalai Lama appeared around Wonpo town.

Meanwhile, also in Kardze, leaflets and posters calling for independence for Tibet appeared on Sunday across nearby Dege county.In some cases, slogans were even painted on walls and on boulders in the area.

Two monks and about a dozen villagers have been detained in Dzamthang county, a Tibetan resident in the area said. He said those detained were beaten and locked up at the Dzamthang county detention center.