Panamanian authorities seized a North Korean-flagged vessel with an undeclared haul of weaponry in the Panamanian port of Manzanillo on Monday night, Panamanian President Ricardo Martinelli said.

Panama's security minister, Jose Raul Mulino, told CNN the ship had arrived from Cuba.

Panamanian authorities had received intelligence the ship was carrying drugs, but a search Monday revealed military equipment hidden among a cargo of brown sugar.

It was not immediately clear what sort of military equipment was found.