The Cubans were arrested along with the captain of the boat, a Costa Rican by the last name of López, when they arrived at a dock in the southern coastal city of Golfito, according to a news release from the ministry. López could face charges for human trafficking.
The detention took place one day after another six Cubans were detained in southern Costa Rican; they were being transported in a truck full of gas tanks.
Thousands of Cubans have passed through Costa Rica in the past two years in hopes of reaching the United States.
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