Afghanistan has hit back at accusations by neighbouring Pakistan blaming it for several days of fighting in a tribal area near the Afghan border. Pakistani armed forces say 140 militants have been killed during sporadic clashes in north Waziristan. Pakistan's Prime Minister Shaukat Aziz has called on the Afghan Government to do more to stop armed militants crossing the border.Afghan Foreign Minister Dr Abdullah Abdullah says the criticism is unjustified. "They ask for intelligence. When we provide intelligence, then they claim that the information is weak," he said. "But they acknowledge the existence of the terrorist training camps on their side of the border, but they do not take any action and then this issue comes out in the media."