At least six people were killed and four others injured when gunmen opened fire on a passenger bus in Hangu district of Khyber Pakhtunkhwa on Satuday.
According to police, the incident, which took place in Zargari area, was result of an old enmity.
Local authorities said the bodies and injured have been shifted to the District Headquarters Hospital.
The police said raids were being conducted to arrest the attackers.
Identities of the dead and the injured were not immediatly known.
