A military helicopter has crashed in southern Afghanistan killing nine soldiers from the Nato-led International Security Assistance Force fighting the Taleban. ISAF said in a statement today that two Nato troops, an Afghan soldier and a US civilian were also injured. There was no enemy fire in the area when the aircraft came down. According to the website iCasualties.org at least 529 foreign troops have been killed so far this year, making it the deadliest since the invasion in 2001.