(CNN) -- It was a mystery that Panama's president said his country was struggling to solve. What was the massive military equipment hidden under hundreds of thousands of sacks of brown sugar on a North Korean boat? Where did it come from? And where was it going before investigators seized the vessel near the Panama Canal? Hours after Panama said it would ask U.S. and British officials for help solving the puzzle, Cuba gave an answer Tuesday night. In addition to 10,000 tons of sugar, Cuba's Foreign Ministry said, the shipment contained "240 metric tons of obsolete defensive weapons" sent to North Korea "to be repaired and returned to Cuba."
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NEW: Panama is still investigating; seeks help from U.S., U.K., U.N.
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Anti-aircraft missile systems and missiles were in the shipment, Cuba says
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Panamanian search of North Korean ship results in "violent" confrontation, official says
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The captain suffered a heart attack and tried to commit suicide, officials say
Members of the U.N.'s North Korea sanctions committee have seen media reports about the boat and are awaiting a formal notification with details from @placeholder.