Four Caribbean nationals were among six people held by US authorities attempting to enter Florida illegally, according to the Associated Press (AP).
The news agency reported that the US Coast Guard intercepted a boat in the Atlantic Ocean with the six people on board.
In a statement Tuesday, the Coast Guard said the six included two Jamaican men, a Dominican man and a Bahamian man, along with two US citizens.
The 20-foot (6-metre) boat in which they were travelling was stopped last week about 30 miles (45 kilometres) east of Sunny Isles Beach, AP said.
It quoted the US Coast Guard statement as saying that one migrant had previous drug convictions, and another had previous convictions for drug trafficking, kidnapping and aggravated assault.