China accused the shadowy East Turkestan Islamic Movement in this week's attack at Beijing's Tiananmen Square that left at least five people dead and 40 others injured.
Chinese security chief Meng Jianzhu said from Uzbekistan, in statements broadcast by Hong Kong's Phoenix Television, that the ETIM was behind Monday's attack, in which a jeep carrying three people ran over tourists and police in the famed square before bursting into flames at the gates to the Forbidden City.
"The violent terrorist incident that happened in Beijing is an organized and plotted act. Behind the instigation is the terrorist group East Turkestan Islamic Movement entrenched in central and west Asian regions," Meng said.
The Chinese government urged all fellow member-states of the Shanghai Cooperation Organization - Kazakhstan, Kyrgyzstan, Russia, Tajikistan and Uzbekistan - to cooperate with China to help prevent these type of attacks from reoccurring.
Authorities said the vehicle had a license plate from Xinjiang, the remote northwestern region that is home to the mainly Muslim Uighurs, a Turkic people.
Five suspects, all with Uighur surnames, were detained in the 10 hours following the attack, although the arrests were not reported until two days later.
Security was heightened in Tiananmen Square, the symbolic heart of China, and other busy areas of Beijing in the immediate aftermath of the attack, while some newspapers reported that tighter-than-usual controls were imposed in Xinjiang.
Uighur organizations in exile have called for an independent investigation into the incident and questioned authorities' allegations that it was perpetrated by members of their community.
The ETIM, whose very existence is doubted by some U.S. officials, has made no claim of responsibility for the Tiananmen attack. EFE