The U.S. Department of the Treasury designated two Russian based entities and six Russian flagged vessels on Tuesday in its latest round of North Korea focused sanctions.

The designations pertain mainly to ship-to-ship (STS) transfers involving North Korean vessels, a practice that is banned under current UN Security Council (UNSC) resolutions.

“Ship-to-ship transfers with North Korea-flagged vessels from Russia or elsewhere of any goods being supplied, sold, or transferred to or from the DPRK are prohibited under the UN Security Council resolutions on North Korea and are sanctionable under U.S. law,” Treasury Secretary Steven Mnuchin was quoted as saying in