Explosion on bus in NW Pakistan kills at least 15

PESHAWAR, Pakistan — Police on Monday said an explosion on a minibus in northwestern Pakistan has killed at least 15 people.
Local police chief Islamuddin Khan said it is unclear whether the explosion was caused by a bomb or the gas cylinder used to power the bus.
The bus was traveling between the cities of Hangu and Kohat when the blast occurred. Islamist militants frequently carry out attacks in this area against both civilians and security forces.