Pakistan has experienced a wave of attacks since the killing of al-Qaeda leader Osama bin Laden in a US raid last month.
Peshawar, in the country's northwest, has been one of the hardest hit. In the most recent incident, dozens of fighters attacked a police checkpoint just outside the city.
But the province's police chief says despite the heavy casualties suffered by his force, his officers are determined to continue the fight.
Al Jazeera's Kamal Hyder reports from Peshawar.
Source: Al Jazeera