Deaths of police officers are being investigated , ISAF public information officer tells CNN . Afghan forces kill 10 Taliban in Helmand province, officials say. Dean would not give more details . The International Security Force is a NATO-led mission in Afghanistan .
Deaths of police officers are being investigated , ISAF public information officer tells CNN . The strike occurred amid a joint operation , he said . Dean would not give more details . The International Security Force is a NATO-led mission in Afghanistan .