10 people were killed and 35 injured when militants fired at least four rockets into a city in northwestern Pakistan early Wednesday morning.

The rockets hit two houses, a mosque and a shop in Bannu, a troubled city in the North West Frontier Province at about 2 am local time, the police said.

Five of those injured were police officers.

News agencies quoted residents as saying that the toll was higher and that the officials could not arrive at a figure because relatives had kept some of the bodies.

There has been an increase in violence in Bannu and other cities in the northwest ever since the Pakistan government stormed a radical pro-Taliban mosque in Islamabad recently.

Some also attribute it to the redeployment of the army to North Waziristan, the tribal region closest to Bannu.