PESHAWAR: Twelve militants were reportedly killed when fighter jets bombed insurgent hideouts in parts of northwest Pakistan's Orakzai tribal region, DawnNews reported on Wednesday.

An unspecified number of militants was also reported wounded in the assault that destroyed four hideouts in the tribal region, security sources told DawnNews.

The hideouts were situated in Orakzai's Mamozai, Sama bazaar and Manzar Taap areas.

The casualty figures from the reported action could not be independently verified.

Security sources say over 92 per cent of Orakzai has been cleared of militants in the ongoing military operation in the region.

The sources say 507 militants have been killed in the operation during which 36 security forces' personnel have also lost their lives.