At least five people have been killed and six others wounded in shootings at two Pakistani military posts in a semi-autonomous tribal region bordering Afghanistan. Security officials say rockets hit a base near Miranshah in North Waziristan before dawn on Sunday, killing at least three people, including a soldier, and wounding four. Later in the same region, Pakistani security forces fatally shot two armed men at a checkpoint and arrested two others, one of whom was wounded. Pakistan's army has been trying to clear militants from its tribal regions. Many of the militants operating in the border areas are al-Qaida - linked fighters who fled Afghanistan after U.S.- led forces ousted the Taleban.