An arms control institute says fighter jet parts seized from a North Korean ship by Panamanian authorities were likely intended for use by North Korea, an apparent violation of U.N. sanctions.

 The findings by the Stockholm International Peace Research Institute contradict Cuba's claim that it was not violating the sanctions as it was sending jet parts, missiles and other equipment to North Korea for repairs and expected it all to be returned.

 U.N. sanctions are imposed because Pyongyang's pursuit of nuclear weapons forbid it from trading arms

 The ship, Chong Chon Gang, was intercepted July 15 in the Panama Canal. The military equipment was found beneath the 10,000 tons of sugar.

 The institute's findings are being published Tuesday by the U.S.-Korea Institute at Johns Hopkins School of Advanced International Studies. (AP)