Pakistani Taliban chief Hakimullah Mehsud received splinter injuries to his head and back in an American missile strike in Pakistan's lawless Waziristan tribal region that killed at least 15 militants, according to intelligence officials.Mehsud, who became the Tehrik-e-Taliban chief after the killing of his predecessor Baitullah Mehsud in a drone attack in August last year, was injured in Thursday's United States' missile strike at Basalkot in Shaktoi area.