China said the safety of the diplomatic personnel and missions is an obligation of the sovereign countries but declined to comment on its reported complaint to Pakistan that its ambassador to Islamabad faced threats from a Xinjiang-based terror group. China reportedly asked Pakistan to step up the security of its newly-appointed ambassador in Islamabad in the wake of threats to his life from the East Turkestan Islamic Movement, according to reports. The Chinese embassy made the request in a letter written to Pakistan’s interior ministry on October 19, saying a member of the ETIM has sneaked into Pakistan to assassinate its ambassador Yao Jing.