At least 65 oil tankers have dropped anchor at multiple locations, including off the coasts of China and Russia, since the United States announced a new sanctions package on Jan. 10, ship tracking data showed on Monday.

The Group of Seven democracies has sought to crimp Russia's oil export earnings that help fund the war against Ukraine. But Western governments and sanctions experts say Moscow has resorted to using a so-called shadow fleet of hundreds of aging tankers of uncertain ownership and safety practices that are dodging sanctions and keeping the oil revenue coming.

At least 65 oil tankers have anchored in various locations around the world, including off the coasts of China and Russia, since the US announced a new package of sanctions on January 10, Reuters reports.