China says police in the restive western region of Xinjiang have busted 23 terror and religious extremism groups and caught more than 200 suspects so far this month.
It is the first such announcement since an attack last week in the region's capital killed at least 34 that police have blamed on a "terrorist gang".
The official Xinhua News Agency cited the regional security bureau in providing the information.
Many among the Muslim Turkic Uighur people of Xinjiang claim they are discriminated against by the Chinese government and dominant Han ethnic group. Recent attacks blamed on radicals among the Uighurs have become bolder.
In Thursday's attack, two trucks plowed through crowds at a market in Urumqi, with explosives tossed from their windows.