The US has announced it is sending an aircraft carrier to the waters off South America as it ramps up an operation to target alleged drug smuggling boats.

The Pentagon said in a statement that the USS Gerald R Ford would be deployed to the region to “bolster US capacity to detect, monitor, and disrupt illicit actors and activities that compromise the safety and prosperity of the United States homeland and our security in the Western Hemisphere”.

The vessel is the US Navy’s largest aircraft carrier. It is currently deployed in the Mediterranean alongside three destroyers, and the group are expected to take around one week to make the journey.

There are already eight US Navy ships in the central and South American region, along with a nuclear-powered submarine, adding up to about 6,000 sailors and marines, according to officials.

It came as the US secretary of war claimed that six “narco-terrorists” had been killed in a strike on an alleged drug smuggling boat in the Caribbean Sea overnight.

Pete Hegseth said his military had bombed a vessel which he claimed was operated by Tren de Aragua – a Venezuelan gang designated a terror group by Washington in February.

Writing on X, he claimed that the boat was involved in “illicit narcotics smuggling” and was transiting along a “known narco-trafficking route” when it was struck during the night.

All six men on board the boat, which was in international waters, were killed and no US forces were harmed, he said.

Ten vessels have now been bombed in recent weeks, killing more than 40 people.

Mr Hegseth added: “If you are a narco-terrorist smuggling drugs in our hemisphere, we will treat you like we treat al Qaeda. Day or NIGHT, we will map your networks, track your people, hunt you down, and kill you.”

While he did not provide any evidence that the vessel was carrying drugs, he did share a 20-second video that appeared to show a boat being hit by a projectile before exploding.

Speaking during a White House press conference last week, Donald Trump argued that the campaign would help tackle the US’s opioid crisis.

“Every boat that we knock out, we save 25,000 American lives. So every time you see a boat, and you feel badly you say, ‘Wow, that’s rough’. It is rough, but if you lose three people and save 25,000 people,” he said.

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On Thursday, appearing at a press conference with Mr Hegseth, Mr Trump said that it was necessary to kill the alleged smugglers, because if they were arrested they would only return to transport drugs “again and again and again”.

“They don’t fear that, they have no fear,” he told reporters.

The attacks at sea would soon be followed by operations on land against drug smuggling cartels, Mr Trump claimed.

“We’re going to kill them,” he added. “They’re going to be, like, dead.”

Some Democratic politicians have expressed concerns that the strikes risk dragging the US into a war with Venezuela because of their proximity to the South American country’s coast.

Others have condemned the attacks as extrajudicial killings that would not stand up in a court of law.

Jim Himes, a member of the House of Representatives, told CBS News earlier this month: “They are illegal killings because the notion that the United States – and this is what the administration says is their justification – is involved in an armed conflict with any drug dealers, any Venezuelan drug dealers, is ludicrous.”

He claimed that Congress had been told “nothing” about who was on the boats and how they were identified as a threat.