Pakistani police say at least five militants have been killed and two policemen wounded in a gunfight near the city of Peshawar.

Authorities said at least 30 insurgents launched an attack Wednesday against police at a checkpoint. But they said police did not suffer major casualties because they were tipped off about the raid.

In a separate incident, a bomb blast at a checkpoint in Jamrud in the Khyber tribal area killed a policeman and wounded three others.

The number of attacks by insurgents in Pakistan has markedly increased since U.S. commandos early last month raided the Pakistani hideout of al-Qaida leader Osama bin Laden and killed him.

Nearly 4,500 people have been killed throughout Pakistan in attacks blamed on the Taliban and Islamic terror networks since government troops assaulted a radical mosque in Islamabad in 2007.