ISLAMABAD -- A suicide bombing that killed three Chinese language teachers in Karachi will aggravate concerns about the safety of thousands of Chinese living in Pakistan and test Beijing's patience with repeated attacks by a separatist group behind the deadly blast.
The instructors, who worked at the University of Karachi's Confucius Institute, and a Pakistani also killed were traveling on a minibus when Tuesday's blast occured. It was the first major attack on Chinese nationals in Pakistan since last year.
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