The U.S. Treasury Department on Friday issued new designations against two Taiwanese nationals, three Taiwanese companies, and one oil tanker, for supplying oil to North Korea in breach of UN resolutions.

Treasury’s Office of Foreign Assets Control (OFAC) designated the Taiwan-based entities Jui Pang Shipping and Jui Zong Ship Management, as well as Hong Kong-based entity Jui Cheng Shipping Company, and their directors Huang Wang Ken and Chen Mei Hsiang.

An oil tanker called the Shang Yuan Bao – which was already investigated by the UN Panel of Experts (PoE) and blacklisted by the UN Security Council (UNSC) last year –