Beijing police said yesterday that Usmen Hasan -- in an SUV carrying his mother and wife, jihadist banners and machetes -- sped onto the pavement, crashed in front of a giant portrait of Mao Zedong and set the car alight.
The incident in the symbolic heart of the Chinese state killed two tourists, with 40 other people injured, and all three in the car died, police said.
Five other suspects with Uighur-sounding names were captured within 10 hours, although police only announced their detention two days later.
Beijing regularly calls such incidents "terrorism", but Uighur organisations dismiss that as an excuse to justify religious and security restrictions. Information in the area is tightly controlled.
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"I don't think there are any Uighur terrorist organisations, but China gives us a terrorist hat," said a Uighur at a university campus in the capital, who asked not to be named.
"I love this country but I'm afraid that people won't understand me," he added. "It's possible that some would take this kind of extreme measure, but because... They had a very sad experience."
Alim Seytoff, a US-based spokesman for the overseas World Uyghur Congress (WUC), called the official narrative of the Tiananmen event full of holes and discriminatory.
"The Chinese claim is in a way very unbelievable, to some extent outrageous," he told AFP.
"The only reason this is labelled as a terrorist incident is because the passengers happened to be Uighurs."
Seytoff questioned why an attacker would kill his own family, and how religious material could survive in a car engulfed in flames.