Pakistani fighter jets bombed four militant hideouts in the Khadezai and Mamozai areas of the northwestern Orakzai tribal region, near the Afghanistan border, killing 21 militants and wounding 23, military officials said. Orakzai is one of seven ethnic Pashtun tribal areas where the Pakistani military has carried out offensives to root out insurgent groups. Meanwhile, a mortar shell landed on a house in the Aka Khel area of the northwestern Khyber tribal region, near the Afghanistan border, killing three people and wounding two others, officials were quoted as saying by Reuters.