That incident and others in more than a half-dozen African nations show how North Korea, despite facing its toughest sanctions in decades, continues to avoid them on the world's most impoverished continent with few repercussions.
The annual report by a UN panel of experts on North Korea, obtained by The Associated Press, illustrates how Pyongyang evades sanctions imposed for its nuclear and ballistic missile programmes to cooperate "on a large scale," including military training and construction, in countries from Angola to Uganda.
A month before that, the report says, a UN member state seized an air shipment destined for a company in Eritrea containing military radio communications items.
It was the second time military-related items had been caught being exported from North Korea to Eritrea "and confirms ongoing arms-related cooperation between the two countries." Eritrea is also under UN sanctions for supporting armed groups in the Horn of Africa.
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"African enforcement tends to be lax," Marcus Noland, an expert on North Korea at the Petersen Institute for International Economics, wrote last month, adding that "North Korea may deliberately target African countries as a circumvention strategy."
He said North Korea's long military involvement in Africa, and its growing interest in trade there to reduce its deep dependence on China, "bring the continent's relationship with North Korea into increasing conflict with tightening UN sanctions."
But North Korea continues to train and equip some African militaries, the new UN report says.