The US Treasury Department sanctioned VTB, Russia’s second-largest bank, on Monday for maintaining correspondent banking relationships with already sanctioned Iranian banks and helping Tehran evade US sanctions.

According to Treasury, the bank set up correspondent accounts in Iranian rials and Russian rubles and now ranks among the most comprehensively sanctioned banks in the world. The move follows August sanctions on the Dubai branch of Egypt’s Banque Misr and September measures against Turkey’s Golden Global Yatirim Bankasi, part of a secondary sanctions campaign against foreign institutions sustaining Iran’s economy.