On 5 February 1992, among four bombs set in public buildings in Urumqi, Xinjiang, China, two on the buses of line 2 and line 30 exploded. The incidents resulted in 3 deaths, and injuries to 23 people.
Continuing tensions in Xinjiang have been a source of terrorism in China. Conflicts over Uyghur cultural aspirations resurfaced during the 1960s.