Security forces killed 34 Taliban militants in clashes in the restive tribal region on the Afghan border Thursday, the military said, as U.S. pressure mounted on its ally to crackdown hard on militants. The clash in Khyber came just hours before Secretary of State Hillary Clinton was expected to arrive in Islamabad to deliver a tough warning to Pakistan that it must cut what Washington says are links to militant groups. The main route for moving supplies to NATO and American forces in Afghanistan passes through Khyber. The fighting erupted after militants attacked paramilitary Frontier Corps forces and killed three soldiers. "Security forces responded effectively," the military said in a statement, adding that 34 militants were killed in clashes. There was no independent confirmation of the death toll.