 Thomas Turner wrote in the late 1990s that .. ' [ m ] <unk> acts of violence , such as the killings that followed the ' Kasongo uprising ' in Bandundu Region in 1978 , the killings of diamond miners in Kasai @-@ Oriental Region in 1979 , and , more recently , the massacre of students in Lubumbashi in 1990 , continued to intimidate the <unk> 
