South Korea’s justification for a transfer of over three hundred tons of petroleum products to North Korea in 2018 was dismissed by the United Nations Panel of Experts in an annual report published on Tuesday.

The export of the petroleum – subject to strict UN regulations and reporting requirements – was last year authorized by Seoul despite the U.S. warning in September that Pyongyang had exceeded “four times the annual quota” of allowed petroleum imports in the first eight months of 2018 alone.