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Chinese authorities alerted foreign travel agencies Tuesday that they would no longer be issuing entry permits to Tibet, the latest in a series of regulations being put on travelers to Tibet. The announcement follows the self-immolation of two Tibetans last week.

Many are saying that the latest in a string of Tibetan self-immolations led to the country's shutdown to outsiders. According to Free Tibet, a campaign promoting Tibetan independence from China, there have been more than 30 self-immolations since March 2011. Most recently, on May 27, 2012 two Tibetans were the first to set themselves on fire in Lhasa, Tibet's tightly-controlled administrative capital.

The shutdown also coincides with the Saga Dawa festival, which celebrates the Buddha's birth and draws many Buddhists to Tibet. This year, the festival began on June 4, which is also the anniversary of the Chinese government crackdown on the Tiananmen Square protests.

http://news.yahoo.com/china-forbids-international-tourism-tibet-indefinitely-121550685--abc-news-topstories.html