China's already spending billions on overseas investments. Does it need to fund security, too?

Rescue workers and onlookers gather around a wreck after a bus plunged into a ravine following an explosion in Pakistan on July 14.

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Hong Kong (CNN)The death of nine Chinese workers in a bus explosion in Pakistan has underscored the security risks attached to China's overseas projects, as anti-China sentiment simmers in countries where official ties with Beijing are strong.

The bus was carrying a convoy of Chinese engineers to the construction site of the Dasu hydropower plant in northern Pakistan when the blast occurred, killing 13 people.
Initially, Pakistan and China had released conflicting statements over the cause of the incident. Islamabad blamed a gas leak caused by mechanical failure, while the Chinese Foreign Ministry called it a "bomb attack," expressing "shock and condemnation" and asking Pakistan to "severely punish" the perpetrators. The discrepancy raised confusion -- and anger -- on Chinese social media, with some accusing Pakistan of "covering up" the truth.