Pakistan bus blast: nine Chinese workers among 13 killed in bus bombing

Pakistan's remote frontier regions have suffered militant violence for years

At least 13 people were killed on Wednesday after an explosion hit a bus in a remote area of Pakistan. The fatalities include nine Chinese citizens and a member of the Pakistani military.

The bus, which was reportedly carrying Chinese engineers and local security personnel, was en route to the Dasu dam in Upper Kohistan. Thirty people were on the bus at the time of the blast.

Officials said it was unclear whether the blast was caused by a roadside bomb or a device planted inside the bus.

"The bus plunged into a deep ravine after the blast and caused heavy losses. One Chinese engineer and one soldier are missing. The rescue operation is launched and the entire government machinery has been mobilised to rescue the injured by air ambulance," a senior government official told Reuters.

Numerous people were injured in the attack and a local civilian was among the dead, officials said.

Dasu dam is one of the most important Belt and Road infrastructure projects that China is working on in Pakistan. The hydroelectric project is part of the China-Pakistan Economic Corridor, which aims to provide a land route between western China and the Gwadar sea port in southern Pakistan.

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  Rescuers and onlookers gather around the wreck of a bus that plunged into a ravine following a bomb explosion which killed 12 in Khyber Pakhtunkhwa province, Pakistan.

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  The 12 dead included nine Chinese workers.

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  A Chinese national injured in the bus accident awaits further treatment at a hospital in Kohistan district.

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  Soldiers move an injured Chinese national from an army helicopter.

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  Pakistani rescuers move bodies from the scene of the blast.

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  The wreckage of the bus lies at the bottom of a ravine following the blast in Pakistan.

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  Pakistani rescue officials inspect the scene. Nine Chinese nationals were among those killed in the blast.

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  The bus was carrying Chinese engineers to the Dasu Dam.

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  An injured Chinese national is taken to hospital after the explosion.

But the Kohistan region, which borders the former Pakistani Taliban stronghold of the Swat valley, has suffered years of insecurity. In 2012, 18 Shiite pilgrims were taken off a bus and shot dead at a checkpoint set up by militants.

In 2015 militants attacked a paramilitary outpost, injuring five Pakistani rangers. Attacks on foreigners, including Chinese citizens, are rare in Pakistan but there have been a number of high profile attacks in the past.

In May, five people were killed when a bomb exploded outside a hotel in the city of Quetta. China's ambassador was due to arrive at the hotel at the time, but escaped injury.

Pakistan's branch of the Taliban later claimed the attack, saying that foreign officials were among the targets of the bombing.