New satellite images have revealed a bold move by Russia: secretly supplying North Korea with over 1 million barrels of oil this year. This discovery was made by analyzing the movement of ships between Russia and North Korea through satellite images.

Russia is estimated to have supplied North Korea with more than a million barrels of oil since March this year, according to satellite imagery analysis from the Open Source Centre, a non-profit research group based in the UK.

A top South Korean official says Russia has supplied air defense missile systems to North Korea in exchange for Pyongyang sending troops.