An improvised explosive device planted by militants went off in the town of Ibrahimzai during a routine patrol by paramilitary soldiers, a security official said.

"Two soldiers and one civilian were killed in the blast," Abdul Qadir, a local administration official, told AFP.

Seven other people -- one soldier and six civilians -- were wounded in the explosion near the bazaar in Ibrahimzai, he said.

A military official in the provincial capital Peshawar confirmed the incident, saying the wounded had been taken to the local hospital.