At least three Frontier Constabulary (FC) personnel were killed in a blast in North Waziristan's Ghulam Khan area of Pakistan, on Sunday.
According to Dawn, an improvised explosive device (IED) blast took place targetting the personnel's vehicle when they were patrolling in the area.
A curfew was, hence, imposed in the area.
The security forces have launched a search operation to nab the culprits behind the explosion.
Earlier this month, five people were killed in an IED blast in South Waziristan.
Officials had said the head of a peace committee Wali Jan Mehsud was among those killed in the attack.