In Afghanistan, an Army officer opened fire on foreign troops today after an argument at the military airport in capital Kabul leading to casualties. Defence Ministry said at least three people were killed and wounded in the incident, but gave no specifics. Ministry spokesman Gen. Mohammad Zahir Azimi said the gunman, an Afghan military pilot, was among those killed in the shooting. He said an argument happened between him and the foreigners and they have to investigate that. Taliban claimed responsibility for the attack but their claim has yet to be ascertained by Afghan authorities. The incident is several of such in recent months and comes after a suicide attack inside defence ministry in Kabul early this month.