 After a number of student demonstrations in the 1980s, the Baren Township riot of April 1990 led to more than 20 deaths.1997 saw the Ghulja Incident and Urumqi bus bombs, while police continue to battle with religious separatists from the East Turkestan Islamic Movement.Recent incidents include the 2007 Xinjiang raid, a thwarted 2008 suicide bombing attempt on a China Southern Airlines flight, and the 2008 Xinjiang attack which resulted in the deaths of sixteen police officers four days before the Beijing Olympics.