At least 31 militants were killed Tuesday during Pakistani security forces operation in the Orakzai tribal agency, according to local TV reports.

The private Geo quoted sources as saying that security forces operation is underway in different parts of Orakzai, the only tribal area which is not bordering Afghanistan.

The Orakzai offensive has become an intensive from the last six days that have killed over 150 militants.

Orakzai Agency has a large number of presence of local, al- Qaida and foreign militants. Militants fled to this area months ago before the military operation was started in South Waziristan.

Orakzai Agency is the second smallest in area after Bajaur Agency. It is bounded by Kurram agency in the west, Khyber in the north, Kohat District on the south and Peshawar in the east.

The whole of the territory of Orakzai agency is a mountainous and hilly region with a fertile valley. In this regard it is a paradise for al-Qaida and other militants to find sanctuaries and use it as the launching pad against Pakistani security forces and even for Afghanistan violence.