Authorities in Puerto Rico say they have seized more than 3,500 pounds (1,600 kilograms) of cocaine after chasing and stopping a boat north of the U.S. territory.

U.S. Attorney Rosa Emilia Rodriguez said Wednesday that four men were arrested.

She said federal agents fired at the boat early Monday to disable its engines because the men did not stop as instructed. She said two of the men were arrested after they jumped into the water.

The seizure is one of the largest reported this year.