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The Marinera seizure and the Venezuela blockade
Summary
A retrospective on the US boarding of a Russian-flagged tanker in the North Atlantic and the blockade behind it.
What happened to the Russian-flagged tanker Marinera, and why did it matter beyond the Caribbean? By 8 January 2026, the day after the vessel was boarded, the episode had become a point of contact between Washington and Moscow in a campaign aimed at Venezuela's oil trade.
On 7 January 2026, the United States boarded and seized the sanctioned tanker, also known as Bella 1, in the North Atlantic. As reported at the time, the ship had breached the US naval blockade around Venezuela. The seizure took place in the Atlantic near Iceland, far from Venezuelan waters.
The blockade behind it
The blockade was part of Operation Southern Spear. The United States enacted it on 17 December 2025 against sanctioned oil tankers travelling in and out of Venezuela, after imposing additional sanctions affecting the country's oil trade.
A week before the blockade was announced, on 10 December, US forces seized the tanker Skipper in the Caribbean Sea off the Venezuelan coast. Washington then concentrated its military effort on intercepting and pursuing other tankers trading with Venezuela.
A second vessel
On the same day as the Marinera boarding, 7 January 2026, the United States also seized the Panama-flagged tanker M Sophia in the Caribbean Sea.
The Marinera case tied the Venezuela operation to Russia–United States relations, because the seized ship was Russian-flagged and under sanctions.
