Story highlights

Two others are injured

The explosion takes place in Orakzai agency

No one has taken responsibility for the attack

Islamabad, Pakistan CNN  — 

Hashim Khan, an anti-Taliban tribal leader, was killed in northwest Pakistan on Wednesday when a bomb hidden in his car detonated, police said.

Two of Khan’s colleagues traveling with him were injured, said police official Abdul Rashid.

The explosion took place at 1 p.m. in Hangu city in Orakzai Agency, one of seven semi-autonomous tribal regions in northwest Pakistan, known to be a hotbed of militancy.

Khan was an influential tribal elder who led a local resistance against the Taliban and its many factions.

No one has taken responsibility for the attack.