ISLAMABAD The lingering small-scale border disputes between Afghanistan and Pakistan are making it difficult for Pak security forces to fight terrorism and eliminate cross-border movements, sources informed on Sunday. Well-placed military sources informed TheNation on Sunday that US supported Pak-Afghan border management project was unlikely to achieve its objectives because of the petty border disputes between Afghanistan and Pakistan. It is very difficult to curb border crossings unless there are adequate security measures adopted on Afghan side of the border, sources maintained. They said that despite limited resources, Pakistan had set up a large number of security checkpoints at the Pak-Afghan border to tackle massive border crossings but the menace of cross-border movements continued unabated. We have killed many militants when they were trying to enter Pakistani side of the border. But that is not a sustainable solution, sources disclosed, adding Pakistans security forces badly needed fencing, equipment for nighttime operations as well as early warning systems to tackle these challenges. They were of the view that US-led multination forces and troops from National Afghan Army were often very helpful and cooperative, but they were too small in number to effectively man the border. Moreover the issues relating to territorial jurisdictions in terms of operational strategies are negatively impacting the war against terror, the sources maintained. The sources further informed these hindrances, if not resolved as early as possible, might also lead to strain the relations between Pakistan and Afghanistan in future, especially after the US-led multinational forces left the war-torn country. The enigma of cross-border movements and US-led 'concerted efforts to effectively manage the border dealt a critical blow to Pakistani efforts recently when a significant number of militants had made their escape good into Afghanistan ahead of military operation in Bajaur Agency.