The report by UN Special Rapporteur Ben Saul, released Monday to the Human Rights Council, assessed the legality of Operation Southern Spear — the US military campaign targeting suspected narco-trafficking boats in the Pacific Ocean and Caribbean Sea since September last year.
Saul found that the 68 strikes, which have killed at least 223 people, violated international law across multiple frameworks, including the right to life, self-defence, humanitarian law, the law of the sea, and counter-terrorism and narcotics conventions.
"Such attacks amount to serial extrajudicial killings in violation of the right to life," the briefing note states. "There are reasonable grounds to believe that the reported 68 attacks that killed 223 people constituted crimes against humanity of murder under customary international law."
The report concludes that even if the vessels' occupants could be identified as members of designated terrorist groups, those groups had not mounted an "armed attack" on the US that would trigger a right to self-defence under international law. Saul also noted that alternatives such as interception or boarding were available and were not a "last resort."
The White House and State Department have been contacted for response but have not yet commented on the report. Defence Secretary Pete Hegseth has previously defended the operation as necessary to remove "narco-terrorists from our hemisphere" and secure the US from deadly drugs.
The latest confirmed strike occurred on Saturday in the Caribbean, when US Southern Command (Southcom) said it "executed a lethal, kinetic strike on a go-fast vessel operating along established narco-trafficking routes." Southcom stated that "confirmed intelligence revealed the vessel's active involvement in narco-trafficking" and that the operation killed four "narco-terrorists."
President Donald Trump has described the operation as "self-defence" against groups including the Venezuelan Tren de Aragua and Cartel de los Soles gangs, which have been designated as Foreign Terrorist Organisations. The strikes began amid escalating tensions that culminated in the US capture of former Venezuelan President Nicolás Maduro earlier this year.