At least 15 people have been killed in an explosion in a bus in north-western Pakistan, police say.
The blast happened inside the van in Hangu district of Khyber Pakhtunkhwa province. It was carrying 18 passengers from Hangu to nearby Kohat.
It is unclear whether the blast was caused by a bomb planted on the minibus or gas cylinders in the vehicle, a police official said.
Most vehicles in Pakistan are run on gas, which is cheaper than petrol.
A senior police official told the AFP news agency that he could see "two exploded gas cylinders" in the wreckage of the bus.
Abdul Rashid said that the bus collided with another vehicle, causing the gas cylinders to explode.
PHOTO CAPTION
Map of Pakistan locates Hangu district of Khyber Pakhtunkhwa province
BBC