A suicide bomber rammed his explosive-laden car into a vehicle carrying Taliban militants in Pakistan’s troubled northwest Tuesday, killing at least seven insurgents including a local commander, officials said.

A suicide bomber rammed his explosive-laden car into a vehicle carrying Taliban militants in Pakistan's troubled northwest Tuesday, killing at least seven insurgents including a local commander, officials said.

The attack took place in the Mir Ali area, some 35 kilometres east of Miranshah, the main town of North Waziristan tribal district, a hub of Taliban and Al-Qaeda linked militants.

There was no immediate claim of responsibility and the motive of the attack was not clear but militant groups in the past have carried out suicide attacks against each other in the tribal belt.

Qari Saifuddin, a local Pakistani Taliban commander, was travelling in a pick-up truck along with his associates when a suicide bomber smashed his explosive filled car into their vehicle.

"Taliban commander Qari Saifuddin and his six associates were killed on the spot," a local security official told AFP.