PESHAWAR, Pakistan—A police officer says at least four people have been killed by a suicide bomber who blew himself up close to a politician’s home in northwest Pakistan.

Police officer Akhtar Ali Shah says the bomber attacked the house of the chief of the ruling party in the North West Frontier Province. Party head Asafand Yar Wali was unhurt but at least four people were killed in Thursday’s blast.

Northwest Pakistan is home to a growing insurgency by Taliban and al-Qaida militants.

Pakistan’s top diplomat outlined a strategy for battling terrorism Wednesday that emphasizes going-it-alone militarily within Pakistani borders and talking with opponents if they lay down their arms.

The government’s new “roadmap” also includes a media campaign to explain the importance to Pakistan’s people of winning the war against extremists in tribal areas around neighboring Afghanistan, Foreign Minister Shah Mahmood Qureshi said.

Pakistan’s fight against the Taliban and al-Qaida militants comes years after Pakistani intelligence helped create the Taliban militia. Pakistan also was one of the few countries that gave diplomatic recognition to the Taliban’s fundamentalist rule in Afghanistan.