Kohat: Pakistani security forces pushed ahead with an operation in the restive northwest, killing at least 15 Taliban members and capturing 60, the military said on Sunday.

The operation backed by helicopter gunships was launched on Wednesday around Hangu town after militants killed 17 soldiers and abducted 49 paramilitary soldiers and government officials just over a week ago.

A military spokesman said: "The operation is still on. We have successfully cleared the valley and now our troops are fighting militants on the mountains."

Five soldiers were injured in the operation, he added.

The military was using heavy artillery to hit the militants in the area surrounding Hangu.

Authorities have imposed a curfew in and around Hangu.