Eleven suspected terrorist fugitives linked to a deadly attack on April 23 in northwest China's Xinjiang Uygur Autonomous Region have been captured, local police sources said on April 29.

A violent clash occurred between the terrorists and authorities in a town at Kashgar's Bachu County, some 1,200 km southwest of Urumqi, leaving 21 people dead.

Eight suspects were captured on the day of the clash.

According to the Xinjiang police, the terrorist group, headed by Qasim Muhammat, was founded in September 2012.

They had planned to "do something big" in densely populated public areas in Kashgar in the summer, the police said.

The group members were spotted making explosives on April 23 by local police and community workers, which led to the deadly clash.

Vice Minister of Public Security Meng Hongwei said on April 29 that the police have tracked down a batch of homemade explosives, lethal weapons, and flags of "East Turkistan" terrorists after the April 23 clash.