Nine Chinese workers were among 13 people killed on Wednesday when a blast on a bus sent it careering down a ravine in northwestern Pakistan, government and police officials said. While Pakistani officials said the nature of the blast was under investigation, the Chinese embassy in Islamabad said its nationals had come under "attack".

The bus was carrying Chinese engineers, surveyors and mechanical staff to the Dasu dam construction site in Khyber Pakhtunkhwa province, a local government official who did not want to be named told AFP. "The blast sparked a fire in the engine plunging the vehicle into a ravine," he said

Nine Chinese workers were among 13 people killed on Wednesday when a blast on a bus sent it careering down a ravine in northwestern Pakistan, government and police officials said. While Pakistani officials said the nature of the blast was under investigation, the Chinese embassy in Islamabad said its nationals had come under "attack".

The bus was carrying Chinese engineers, surveyors and mechanical staff to the Dasu dam construction site in Khyber Pakhtunkhwa province, a local government official who did not want to be named told AFP. "The blast sparked a fire in the engine plunging the vehicle into a ravine," he said