LONDON: The UK on Tuesday tightened its sanctions on Russia’s so-called shadow fleet, slapping bans on 20 more ships and blacklisting 10 other people or bodies involved in energy and shipping.

Security analysts say the fleet of aging vessels is used by Russia to circumvent international sanctions that ban it from selling oil.

Hundreds of vessels have now been sanctioned by the European Union and the UK since Russian President Vladimir Putin ordered the invasion of Ukraine in February 2022.

The UK’s new additions to its assets freeze list include the Orion Star group and Rosneft Marine (UK), both said to be significant to Russia’s energy sector, as well as the deep-sea research unit at the Russian defense ministry.

Although Russia’s economy has not collapsed under the sanctions, officials insist they are having an impact.