UN Expert Says US Strikes on Suspected Drug Boats May Be Crimes Against Humanity
UN Special Rapporteur Ben Saul has concluded there are reasonable grounds to believe US attacks on boats suspected of carrying drugs in the Pacific and Caribbean were crimes against humanity.
Saul is the Special Rapporteur on the promotion and protection of human rights and fundamental freedoms while countering terrorism. He set out the finding in a briefing note posted on social media on Sunday night. It was first reported by the BBC, according to The Guardian. He said 68 reported US attacks that killed 223 people constituted the crime against humanity of murder under customary international law, the unwritten rules that bind all states even without a treaty.
The reported death toll has now passed 230. A tally from the Washington Office on Latin America cited in the same reporting counted 234 people killed in 66 attacks. The difference reflects different counts of reported strikes.
The latest strike happened on Saturday in the Caribbean and killed four people. US Southern Command said on Saturday it carried out a "lethal kinetic strike" on a go-fast vessel in the Caribbean. It described the four people killed as "narco-terrorists." Reuters separately reported on 20 September 2026 the US military's claim that it killed four people in a Saturday strike on a vessel in the Caribbean alleged to be involved in drugs, according to Reuters.
The US boat strikes began in September 2025 on the stated grounds of stopping drugs trafficked by sea to the US. The campaign has operated under a counterterrorism framing. The administration has designated trafficking groups as terrorist organizations and described suspects as narco-terrorists subject to lethal force.
Saul rejected the claim that the strikes were self-defence against designated terrorist organizations. He wrote the crews "were not militarily armed with intent and capacity to launch military attacks against the US." Under the UN Charter, self-defence requires an armed attack or an imminent threat of one. Policing at sea, even against suspected traffickers, is governed by human rights law and the law of the sea, which require necessity and proportionality, meaning only as much force as needed and balanced to the threat, plus warning and an effort to apprehend rather than kill.
This is not the first UN warning. In September 2025, UN experts warned that the US war on narco-terrorists violates the right to life after a deadly strike. They noted the US Secretary of State had indicated the US could have intercepted a vessel but chose to destroy it to deter traffickers, according to OHCHR. In October 2025, UN experts said US attacks in the Caribbean and Pacific violate international human rights law, at that point reporting over 60 people had been killed in continuing attacks by US armed forces against boats in the Caribbean, according to OHCHR. On 4 November 2025, UN experts said unprovoked lethal strikes by the United States against vessels at sea may amount to international crimes, according to OHCHR. Legal experts have said US strikes on alleged drug vessels may violate international law as well as US laws against murder and prohibitions on assassination, according to Reuters. The UN human rights chief also issued a statement on Friday regarding US military strikes against boats in the Caribbean Sea and eastern Pacific, according to PBS.
The broader context here is a shift in legal language from unlawful killing to systematic international crime. Crimes against humanity do not require an armed conflict. They require a widespread or systematic attack directed against a civilian population, with knowledge of the attack. Think of the difference between judging one shooting and judging an ordered pattern of shootings. By invoking murder under customary international law, Saul is arguing the pattern, scale and policy element meet that threshold. That is a higher allegation than excessive use of force in a single interdiction.
Looking at what this means for Washington, the immediate effect is diplomatic and legal pressure rather than enforcement. A special rapporteur does not prosecute. His findings can inform Human Rights Council debate, General Assembly action, submissions to the International Criminal Court, and domestic litigation over murder statutes and assassination prohibitions. They also narrow the space for third states to cooperate with intelligence sharing, basing or interdiction support without assessing complicity risk. The US has not accepted the UN experts' interpretation and continues to describe the operations as defence against designated terrorist entities.
What to watch next is whether other mandates join Saul's assessment and whether states seek an independent fact-finding mechanism. The death toll, the stated deterrent intent, and the rejection of interception options will be central to any review of necessity and proportionality. The question is no longer only whether a particular strike was lawful. It is whether a year-long pattern of lethal strikes at sea is being consolidated, in UN human rights doctrine, as a policy attributable for purposes of international criminal law.
