Four people were killed and 14 were wounded in Pakistan's main northwest city Thursday when a suicide bomber detonated his explosives in a busy commercial area full of government buildings, authorities said.
The attack was the second in three days in Peshawar, and the latest in wave of violence that has killed more than 500 people in Pakistan since October. Insurgents are suspected of avenging a US-supported Pakistani army offensive against the Taliban in a northwest tribal region along the Afghan border.
The attackers have struck a range of targets, from markets popular with women to security checkpoints. Thursday's attack occurred in a busy sector of Peshawar where buildings housing the state-run airline, a public school and a government insurance company are located.