Puerto Rico's police chief says officers have seized a large quantity of cocaine on board the ferry from the island of Vieques.
Chief Jose Figueroa Sancha tells reporters that more than 560 kilograms (1,235 pounds) was inside two vehicles. Three men were arrested.
Sancha said Tuesday that the seizure was part of an investigation with the U.S. Department of Homeland Security into suspected drug trafficking between the main island of Puerto Rico and the much smaller Vieques. Traffickers have been known to use Puerto Rico to reach the U.S. mainland.
Vieques is a popular tourist destination. The U.S. Navy used the island as a bombing range until 2003 when the military was forced out by protests.