URUMQI, China (AP) — Police shut down the bustling bazaar in the capital of China’s restive Muslim region of Xinjiang today amid threats from an Islamic group that attackers might target buses, trains and planes during the Olympics.

A sign at the entrance of the bazaar in Urumqi did not explain why the area, surrounded by mosques with minarets, was off limits as the country prepared to kick off the Summer Games thousands of miles away in Beijing.

Even a KFC restaurant in the shopping area — filled with touristy shops selling carpets and jade — was closed, and a guard sitting on the steps shooed people away.

The sprawling, far-flung western region of Xinjiang has long been a source of trouble for China’s communist government.

The rugged, mineral-rich territory is populated by the Uighurs, a Turkic Muslim minority that has had tense relations with the Chinese. Many Uighurs favor independence or greater autonomy for Xinjiang, which takes up one-sixth of China’s land mass and borders eight Central Asian countries.

On Thursday, a videotape purportedly made by the Turkistan Islamic Party — a militant group seeking Xinjiang independence — was released with threats to launch attacks during the Olympics.