Nine people were found clinging to the hull, Petty Officer Mark Barney said.
A 10th person was taken by boat to Miami Beach, where he was treated at a hospital and released, Barney said.
The group was taken into custody and authorities were investigating whether the victims and survivors were part of a human smuggling operation.
The nine people found clinging to the hull were Haitian and Jamaican nationals, but the nationalities of the rest of the group were not immediately known, Barney said.
The bodies of four women were recovered from the water. The Coast Guard was no longer searching for possible survivors, Cmdr. Darren Caprara said.
The survivors rescued from the water were still on a Coast Guard vessel at sea and it was unclear whether they would be brought to the U.S. or repatriated. All the survivors were in good condition, Caprara said. via WPEC-TV CBS12 News