A UN and U.S. sanctioned North Korean oil tanker left the DPRK and broadcast its location within Chinese territorial waters earlier in the month, the NK Pro ship tracker shows.

The 3003-tonne tanker, named An San 1, was added to the UN’s blacklist in March last year for its involvement in sanctioned ship-to-ship (STS) transfers of oil products.

Japan’s foreign ministry also released photographs of the An San 1 apparently engaged in cargo transfers at sea on two occasions, in July last year and just two weeks before it arrived near China’s coast