U.S. and Pakistani military forces exchanged fire

According to reports published on 25 September 2008, U.S. and Pakistani military forces exchanged fire across the Pakistani-Afghan border shortly after Pakistani troops fired warning shots at two U.S. helicopters. The skirmish lasted approximately five minutes, and sources indicate that no one was injured in the incident. The exchange comes after U.S. forces have started to increase active missions into Pakistani territory and in turn Pakistani troops have fired warning shots at NATO or U.S. military vehicles that it views as having crossed the border. It is not clear as to the exact location of the incident, as the U.S. military maintains that its forces were in Afghan territory, while the Pakistani military asserts that U.S. troops had trespassed onto Pakistani territory.