ISLAMABAD, Pakistan—Police in the southern city of Karachi are investigating if the attacker who opened fire at a well-known dental clinic, killing one person and injuring two others, was targeting members of the city’s Chinese community. Pakistan has seen a series of attacks on Chinese nationals in recent years as their presence grew alongside Beijing’s investment program in its close ally. Both ethnic separatists and jihadists have hit Chinese personnel and interests. Pakistan has been a showcase for China’s global Belt and Road Initiative, which builds infrastructure abroad in a bid to spread Chinese influence.

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