On Jan. 10 the US Treasury’s Office of Foreign Assets Control sanctioned 161 tankers and traders involved in about 2,000 shipments since the invasion began. It also acted against Moscow-based ship insurers and two companies — Surgutneftgas and Gazpromneft — which in the first 10 months of last year accounted for almost 30% of Russia’s oil exports.

On Jan. 10, the U.S. Treasury announced fresh measures to deplete Russia's energy revenues, including on 183 vessels, largely oil tankers.

Sweeping U.S. sanctions on Russia's oil industry will make it more expensive for Moscow to sell its oil and complicate sea-borne crude exports due to restrictions on tankers, analysts and traders said on Monday.