Last month's violence prompts a security sweep of higher education institutions, an exile group says.
The region's service providers will cut off service to unregistered SIM cards this week.
The incident is linked to recent violence in Xinjiang.
Violence between local Uyghurs and community police leaves two people dead.
A rights group says a recent deadly clash highlights abuses against the minority.
Exile Uyghurs say police fired on angry protesters while Beijing claims police and community officials were killed by 'rioters.'
But Uyghurs say a young boy was hacked to death because of ethnic hatred.
He is suffering from a head injury and fears being forced into psychiatric care.
Residents say Chinese emergency responders let their homes burn.
Chinese authorities destroy their village’s crops and claim the site for a marketplace.
The death ignites ethnic tensions between Uyghurs and Han Chinese in his village.
Beijing is accused of exploiting weak terror laws to suppress information in Xinjiang.
The three students get up to six years in jail on charges they murdered a Han Chinese schoolmate.
Several Uyghurs are rounded up after incidents in southern and central Xinjiang region.
A second violent incident in three days is reported in Xinjiang.
Chinese farmers use government subsidies to edge Uyghurs out of land in Xinjiang.
Uyghurs say midnight police searches for 'illegal religious materials' are unrelenting.