A public-opinion survey by the United Nations indicates that roughly 80 percent of Afghans believe the country's police force is not ready to take over security control from international forces.

The U.N. Development Program's annual “police perception urvey released Tuesday found that only two out of 10 people think the Afghan National Police is strong enough to handle security once foreign combat troops leave Afghanistan in 2014.

NATO forces have been working to train their local counterparts in anticipation of the coalition's withdrawal. Control of security in parts of Afghanistan has already been transferred to Afghan forces.

The U.N. survey found that a majority of the 7,000 Afghans polled believe police corruption is still a major problem.

Separately, NATO said an insurgent attack killed one of its service members in southern Afghanistan on Tuesday. The coalition did not give details.