GUATEMALA CITY (AP) — A U.N.-backed investigative team says its work in Guatemala has helped reduce corruption, but says impunity by officials is still high.

The International Commission Against Impunity in Guatemala says in a report that when it began work six years ago, impunity stood at the 93 percent level. It says that is now 70 percent.

The panel is an independent body with 50 international prosecutors, police officers and lawyers with the responsibility of investigating a limited number of sensitive cases.

Commission director Francisco Dall'Anese said Thursday that his team has lost only one of five major cases that it has brought.

The commission's mission also includes strengthening the attorney general's office and other state institutions before the commission leaves Guatemala, expected after 2015.