The clashes ensued in Dattakhel area of the North Waziristan agency where military has launched a major offensive against militants. The exchange of fire claimed the lives of five militants and one officer.
Authorities, meanwhile, imposed curfew for indefinite period in the agency and officials have warned the tribesmen to remain in their homes.
Pakistan military has intensified its 'Zarb-e-azab' operation launched in June last year in militants' stronghold of North Waziristan after the Peshawar school attack by Taliban militants killed 150 people, mostly students.
