Two ethnic Uighur women pass Chinese paramilitary policemen standing guard outside the Grand Bazaar in the Uighur district of the city of Urumqi in China's Xinjiang region.

People living in a border prefecture in Xinjiang must now give DNA samples when applying for travel documents.

The regulations were put in force before the beginning of the Muslim holy month of Ramadan, which started on Monday and was marked by the government's customary ban on fasting by civil servants, students and children.