From Eat the Buddha: Life and Death in a Tibetan Town, by Barbara Demick (Random House, 2020), Kindle p. 182:
MARCH 2008 SAW protests throughout the region. Men on horseback stormed a township near Labrang Monastery. Police opened fire on protesters in at least one other town in Sichuan province, Kardze (or Ganzi in Chinese). But Ngaba’s protest was the deadliest outside Lhasa, cementing the town’s reputation as a hotbed of discontent. “There’s a saying that when there is a fire in Lhasa, the smoke rises in Ngaba,” the head of an exile association told me a few years later. Although the uprising in Lhasa was for the most part peaceful, it was marred by some nasty personal assaults that strayed far from the Dalai Lama’s teachings on nonviolence. Tibetan gangs attacked random Han Chinese civilians riding motorcycles on a main street in Lhasa and torched shops belong to Hui Muslims, the result of a long history of Buddhist-Muslim tensions in the area. At least twenty were killed, including members of one entire Hui family, burned in their shops. The facts remain unconfirmed because there has never been an opportunity for independent reporting. According to the Tibetan Center for Human Rights and Democracy, which obtained some leaked autopsy reports, at least 101 Tibetans were killed by security services that opened fire on demonstrators.
Ngaba’s Tibetans more closely adhered to the nonviolent ideal. They did not vent their anger against Chinese civilians, only against the police and military. Although there was some looting, for the most part Tibetans spared Hui shops from attack—testament to the long history of congenial relations with Muslims in Ngaba. And in this deadly day of fighting, there were no reports of serious injuries sustained by Chinese in Ngaba.