South Korean prosecutors have asked for a 15-year prison term for the man they say slashed the U.S. ambassador during a breakfast forum in March.

The Seoul Central District Court says prosecutors made the request Thursday at the end of the trial of Kim Ki-jong.

The court says it will issue a verdict Sept. 11.

Kim is facing charges of attempted murder, assaulting a foreign envoy and obstruction after police said he attacked Ambassador Mark Lippert with a knife, inflicting deep gashes on his face and arm. Lippert was treated at a Seoul hospital for five days.

Police said Kim told investigators he chose Lippert as a target to highlight his opposition to U.S.-South Korean military drills.