Sweden has confiscated the cargo ship Caffa, suspected of being part of Russia's 'shadow fleet' and transporting stolen Ukrainian grain. The ship was seized on March 6, and a crew member was detained for maritime code violations. The Swedish Prosecution Authority is investigating the vessel following a request from a foreign state. The ship was reportedly on Ukraine's sanctions list and sailing under a false flag. Russia is believed to be using old tankers to circumvent sanctions imposed by the EU and the US.