NATO in Afghanistan says, its aircraft crossed into Pakistan and fired at suspected militants,killing three soldiers. Nato said its aircraft killed “several armed individuals” as the crew believed they were being fired on. Pakistan says the helicopter attacked a military checkpoint, and strongly disapproved violation of its sovereignty. It has blocked supply routes for US and Nato troops in Afghanistan. Pakistan says that its forces have been stretched because of recent floods. The latest strikes have set a new pattern in the US-led war on terror in Pakistani tribal areas. Previously, drones have been carrying out strikes against al-Qaeda and Taliban targets in the area, but it seems that coalition forces have now decided to start using the “hot-pursuit” option as well. Today's strikes come after months of pressure from the Western coalition urging Pakistan to launch a clean-up operation against militant groups in its North Waziristan tribal area.