PESHAWAR (AFP) - The Frontier Corps said Friday it would tighten security along Pakistans border with Afghanistan by putting an end to informal crossings. All kinds of illegal movement along the Pakistan-Afghan border, including those at Torkham, would be stopped, a statement by the FC said. Any person coming from or going to Afghanistan will not be allowed to cross the border without legal documents, it added. Torkham, on the Khyber Pass, is the main crossing on the 2,500-kilometre border between Pakistan and Afghanistan. However, much of the traffic between the two countries passes through informal crossings or deep in remote mountains beyond government control. A security official based at Peshawar, said arrangements had been made to stop infiltration by militants, without giving details. We have already taken extra security measures and a surveillance system has also been intensified, the official said, requesting anonymity. According to Pakistani officials, more than 1.2 million Afghans are still in Pakistan after fleeing civil war and Taliban rule in their homeland.