The US president posted footage of Thursday’s operation, part of a recent military campaign targeting boats transporting drugs to America.
“It was my great honor to destroy a very large DRUG-CARRYING SUBMARINE that was navigating towards the United States on a well known narcotrafficking transit route,” Mr Trump wrote on Truth Social.
“US intelligence confirmed this vessel was loaded up with mostly Fentanyl, and other illegal narcotics,” he added.
The US military staged a helicopter rescue for the survivors on Thursday after the strike on their semi-submersible
vessel, suspected of trafficking illegal narcotics. They were then transported to a US Navy warship.
Two other crew members on board were killed.
President Trump confirmed the survivors would be returned to their home countries of Colombia and Ecuador “for detention and prosecution”. Both countries subsequently confirmed they had been handed over.
“America will not tolerate narcoterrorists trafficking illegal drugs, by land or by sea,” he added.
On Saturday, Colombian President Gustavo Petro posted on X: “We have received the Colombian detained on the narco submarine, we are happy he is alive and he will be processed according to the law.”
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The Trump administration has said previous strikes in the Caribbean have killed 27 people, raising concerns among some about the legality of the military operations.
The strikes also come against the backdrop of a US military buildup in the Caribbean that includes guided missile destroyers, F-35 fighter jets, a nuclear submarine and around 6,500 troops as the US president escalates a standoff with the Venezuelan government.
On Wednesday, Mr Trump disclosed he had authorised the CIA to conduct covert operations inside Venezuela, adding to speculation in Caracas that the US is attempting to topple Venezuelan President Nicolas Maduro.
Mr Maduro has denied any connection to drug smuggling and claimed the US boat strikes are a pretext for regime change, and violations of sovereignty and international law.