Police sources said that unidentified armed men forced police personnel to alight from Punjab-bound bus and killed them on Loralai-Dera Ghazi Khan road.
In another incident, unknown armed men attacked a police vehicle in Chichloo area of Loralai district and opened fire at police personnel, leaving three policemen dead. The assailants managed to escape from the scene.
The law enforcement agencies rushed to the site and shifted to the dead to hospital for autopsy. They also cordoned off the entire area to trace out the suspects. Further probe was underway.