Three service members working with the International Security Assistance Force (ISAF) have been killed in two separate incidents in eastern Afghanistan. \"Two International Security Assistance Force (ISAF) service members died following an improvised explosive device (IED) attack in eastern Afghanistan today,\" the ISAF said in a statement on Sunday. Another ISAF trooper was killed in a militant attack also in the eastern part of the country on Saturday. The brief statement did not disclose the nationalities of the victims or the exact location of the attacks. However, the troops, deployed in southern Afghanistan, are mainly from the United States, Britain, and Australia. According to independent website icasualties.org, at least 247 US-led forces, most of them Americans, have died in Afghanistan so far this year.