Russian state tanker operator Sovcomflot has reportedly accepted that US-led sanctions are causing “operational difficulties” after its businesses and more than 20 vessels were targeted over the war in Ukraine.

The company has previously said it was unfairly targeted and would appeal against the listings but the US Treasury has continued to ratchet up the pressure against the company. The moves peaked last month when 14 of its tankers were blacklisted on a single day.