At least three people were killed and 26 injured as a result of an IED explosion in Bajaur Agency's Charmang area on Friday, according to initial reports by political administration.

The blast occurred in Nawagai tehsil of Charmang area and targeted labourers, the political administration said. The injured have been moved to District Headquarter Hospital Khar while the area has been cordoned off by security forces.

“At least three people have been killed and 26 wounded, the roadside bomb exploded when the truck passed by,” Mustafa Khan, a local government official told AFP.

Anwarul Haq, a senior local government official, confirmed the casualties, telling AFP that the injured have been taken to local hospitals.

No militant group has yet claimed responsibility for the attack, but Taliban militants have carried out several bomb attacks against security forces and pro-government tribal elders in the area in the past.

The incident comes as Operation Khyber-4, launched under Operation Raddul Fasaad (RuF) by the Pakistan Army in the Rajgal Valley area of Khyber Agency, gains momentum.

Earlier, four personnel of the Pakistan Army had lost their lives while attempting to foil a terrorist attack in Khyber Pakhtunkhwa's Upper Dir district on Wednesday.