DERA ISMAIL KHAN: Drive-by gunmen killed two militants and wounded three in another car in northwestern Pakistan on Wednesday, officials said. No one claimed responsibility for the shooting, but an area intelligence official said the attack may have been linked with rivalry between pro-Taliban tribal militants and a group of Uzbek fighters. The attacked militants were believed to be loyal to a pro-Taliban tribesmen known as Hanan, who had started a campaign to oust Uzbek militants living in the Shakai mountain valley region north of Wana, an intelligence official said. On Sunday, Hanan and two of his fighters were wounded when their pickup truck was bombed in Shakai, a government official said. Security officials have said that Arab, Central Asian and Afghan militants had used Shakai as their hideout before Pakistani security forces overran their bases in recent years.