Locals say murders have raised tensions between religious groups.
Gunmen on Tuesday killed two schoolteachers in Hangu, police said.
The double murder came as the teachers were going to the government high school where they worked. “Gunmen on motorcycles opened fire at two teachers of government high school. One died on the spot, while the other died in hospital,” said district police chief Iftikhar Ahmed.
There was no immediate claim of responsibility for the attack.
Local residents said the murders had raised tensions between religious groups and they joined students in a protest and blocked a main road in the town. One of the teachers killed was Shia while the other was Sunni.
Hangu lies just a few kilometers from the tribal areas, where militants linked to the Taliban and Al Qaeda have carved out strongholds. It has long been a flashpoint for violence against minority Shias, who make up an estimated 20 percent of Pakistan’s population of 180 million.