A government official said Monday a roadside bomb killed at least five people and wounded several others in a northwest tribal region close to the Afghan border.

Mohammad Iqbal Khan said the remote controlled bomb was detonated in Tirah valley in the Khyber tribal region as volunteers from a peace committee were moving into the area.

Khan said the attack took place in a remote area of the valley and the wounded were being transported to a hospital in the region.

Those killed in the attack had been identified as Zar Wali, Noor Khan,  Gul Nawaz, official Abdul Manan and Tamiz.

No group has immediately claimed responsibility but Islamic State group militants have been responsible for previous similar attacks.

Pakistan Army is battling militants in tribal regions bordering Afghanistan.