According to reports gas filled in the mine resulting in an explosion early morning today when hundreds of miners were at work at Dolai coalmine.
The relief and rescue teams rushed to the spot of the incident and retrieved dead bodies and injured from the mine.
The injured people were admitted at nearby hospital for medical attendance.
Around 3,000 miners work at coalmines in Orakzai, which are notorious for poor safety standards.
The workers at these mines risk their lives by using conventional methods of mining due to unavailability of modern equipments and facilities.