The South Korean foreign ministry believes that “numerous” sanctions-violating ships entered ROK ports since last August, lawmaker Shim Jae-cheol revealed on Wednesday, with the country’s customs administration now reportedly investigating the cases.

The statement comes amid an investigation into how the then-Panama-registered Sky Angel and Sierra Leone-flagged Rich Glory ships were able to unload some 9000 tons of DPRK-produced coal at the South Korean ports of Incheon and Pohang in October last year.

Citing material provided by the Korea Customs Service, Shim, from the opposition Liberty Party of Korea, said other ships believed to have violated the UNSC resolutions on the