Official sources said militants had opened fire on security forces when they were conducting a search operation in the agency.
Five militant hideouts were also destroyed.
Earlier on September 24, at least ten militants were killed and two hideouts were destroyed during an in Upper Orakzai.
The security forces claimed to have targeted militant hideouts through gunship helicopters in the area of Mamoozai, Dabori, Ali Khel and Mala Khel.
An operation had been launched in Orakzai Agency in March 2010 to clear the agency of militants. Security forces claimed that they had cleared most areas of militants except the Mamozai area in Upper Orakzai.
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