"Caught RED HANDED - very disappointed that China is allowing oil to go into North Korea. There will never be a friendly solution to the North Korea problem if this continues to happen!" Trump tweeted.
Trump's tweet came after reports emerged that the U.S. satellites had captured images of Chinese ships selling oil to North Korean ships on the West Sea at least 30 times in the past three months.
The U.N. Security Council had recently imposed new sanctions on North Korea, seeking to limit its access to refined petroleum products and crude oil after the latest intercontinental ballistic missile test by Pyongyang.