Authorities in the Dominican Republic said Sunday they had confiscated some of the cocaine transported by a speedboat that was destroyed recently by the U.S. navy, after the Trump administration carried out a controversial anti-narcotics mission in the southern Caribbean.

A spokesperson for the country's National Directorate for Drug Control said 377 packages of cocaine had been recovered from the boat, which was allegedly carrying 1,000 kilos of the drug.

He added the boat was destroyed about 80 nautical miles south of Isla Beata, a small island that belongs to the Dominican Republic.

Officials said the Dominican Republic's navy worked in conjunction with U.S. authorities to locate the speedboat, which was allegedly trying to dock in the Dominican Republic and use the nation as a “bridge” to transport cocaine to the United States.

The U.S. sent eight warships and a submarine to the southern Caribbean, in what the Trump administration said was a mission to fight drug trafficking.

According to the White House, the flotilla so far destroyed three speedboats carrying drugs in separate strikes, killing more than a dozen people.

Human rights groups have said the strikes on the boats amount to extrajudicial killings, and on Friday, two Democratic senators introduced a resolution in Congress that seeks to block the administration from carrying out further strikes.

The Trump administration suggested that at least two of the boats that were sunk left from Venezuela, whose president is often described by White House officials as a drug trafficker and leader of a gang known as the Cartel of the Suns.

Venezuelan President Nicolás Maduro denies the charges and has described the U.S naval build up in the Caribbean as an attack on his country.