Gunmen have opened fire on a bus in the northern Pakistani district of Kohistan, killing at least 18 people and injuring seven, officials say.
No group has yet said it carried out the attack.
The bus was travelling from the city of Rawalpindi to the northern town of Gilgit.
The mountainous Kohistan region is not known for militancy, but it borders the Swat valley, which had a significant Taliban presence in the past.
"Armed men hiding on both sides of the road attacked the bus," local police chief Mohammad Ilyas told the Agence France-Presse news agency.
It is unclear why the bus was targeted, but one report suggests that there may be a sectarian motive.