A sanctioned North Korean oil tanker rendezvoused with two DPRK cargo vessels near the country’s largest port city earlier this month, NK Pro analysis shows, in a possible ship-to-ship transfer to bypass international restrictions on importing energy resources.

Fleetmon and NK Pro ship-tracker data indicates that the oil tanker Samjong1 (IMO 8405311) approached the two larger North Korea-flagged freighters — the K M (also known as the Kal Ma, IMO 8503228) and the Pu Yvn (also known as HUA YUAN DA 79 or Pu Yun 1, IMO 8358776) — west of Nampho on June 17.

Planet Labs satellite imagery of the location