According to a Stratfor SITREP, which they got from Reuters,
The entire city of Kashgar, Xinjiang, is under martial law, and authorities have arrested at least 100 Uighurs, a spokesman for the World Uyghur Congress said, Reuters reported. It could not be confirmed if indeed martial law was ordered. The spokesman said that there is no way to protest peacefully the Chinese suppression and the policy of calculated resettlement in Kashgar.
The Uighur flag is interesting, Reminiscent of the Turkish one.