A suicide bomber on a motorcycle has killed a senior regional police official in northwestern Pakistan and one of his guards, police said.

Six other police officers were injured in the attack in Peshawar on November 24 that killed deputy provincial police chief Ashraf Noor, city police chief Tahir Khan said.

Noor also held the additional rank of inspector-general of police.

Khan said Noor was traveling to his office when the attacker slammed into his vehicle with the motorcycle. He said some of the attacker's remains had been recovered by police.

Peshawar is the capital of the northwestern Khyber Pakhtunkhwa Province, where Pakistani Taliban often target security forces.

Television footage from the scene of the attack showed the burning vehicle as firefighters attempted to extinguish the blaze.

Khan said that Noor died at the scene, and that one of his five guards later died in the hospital.

Pakistani Prime Minister Shahid Khaqan Abbasi "strongly" condemned the attack.

"Our resolve to eradicate the menace of terrorism cannot be shaken," he said.

A person who claimed to be a spokesman for the militant Lashkar-e Islam (Army of Islam) group called RFE/RL on November 24 and said that the group was responsible for the attack.

That claim, however, could not be immediately corroborated.

Authorities have previously accused Islamic State militants and the Pakistani Taliban of carrying out similar attacks in the country.

With reporting by AP, Reuters, AFP, and Dawn