North Korea’s oil tankers left a Russian terminal seemingly empty handed after waiting near the facility for weeks following the U.S. designation of its owner, data from the NK Pro Ship Tracker shows.

At least three tankers left the area and headed southeast, without docking at the Russian terminal belonging to a subsidiary of the Independent Petroleum Company (IPC), while two other North Korean tankers continue to wait near the facility, where they have stayed for several weeks.

The U.S. Treasury Department’s Office of Foreign Assets Control (OFAC) designated IPC and