NATO says an insurgent attack Friday in eastern Afghanistan has killed two service members of the international military coalition.

NATO has transferred security control of large portions of Afghanistan to local authorities. Most of the 130,000-strong foreign force is set to leave the country by the end of 2014.

Afghan President Hamid Karzai and leaders of the foreign donor nations meet Sunday in Chicago to finalize details of foreign troop withdrawal and outline future international assistance to the war-torn country.

On Thursday, four attackers equipped with explosive vests, guns and rocket-propelled grenade launchers stormed a governor's compound in western Afghanistan, killing six police officers and one civilian.

Officials say all the attackers died in the incident in Farah province.