PESHAWAR, Pakistan, – A blast on a bus in northwest Pakistan which then plunged into a ravine killed 10 people including six Chinese citizens on Wednesday, officials said.

“The blast sparked a fire in the engine, plunging the vehicle into a ravine killing 10 people, including six Chinese nationals,” a senior local administration official told AFP, requesting not be named.

A further 31 Chinese nationals were injured in the blast in the Upper Kohistan district, he added.