Police sources in the area told the media on Saturday that the incident occurred when roadside explosives hit a vehicle of the paramilitary Frontier Corps in the Khyber district of the province.

Police sources said the force vehicle was on routine patrol in the area when the blast occurred, Xinhua news agency reported. He said at least two security personnel were seriously injured in the blast.

After the incident, rescue teams, police and security forces reached the spot and shifted the injured to a nearby hospital.

Police and security forces have cordoned off the area and started a search operation to nab the criminals.

No group or individual has yet claimed the blast.