A government official says a suicide bomber has attacked a vehicle carrying an area commander of the tribal police in northwest Pakistan, killing three people and wounding at least 35.

The official, Iqbal Khan, says area commander Tehsinullah Khan was among those wounded in the attack Tuesday in the tribal region of Jamrud.

He says the attacker was on foot and that he blew himself up as Khan's vehicle came out from the headquarters of the tribal police.

Jamrud is located about 25 kilometers (15 miles) northwest of Peshawar, the capital of Pakistan's Khyber Pakhtunkhwa province.

No one claimed responsibility for the blast, but suspicion immediately fell on the Pakistani Taliban and other local militant groups fighting the government.