The Singaporean government is investigating two companies named in recent U.S. designations for laundering money and purchasing oil products on behalf of the DPRK, local media reported on Thursday.

The authorities told media they were made aware of the sanctions before they were announced on Tuesday.

“Singapore will strictly fulfill its obligations under the United Nation Security Council Resolutions (UNSCRs) and international law, and not allow our financial system to be abused for the conduct of illicit activities,” the country’s foreign ministry told Channel News Asia.

The U.S. Treasury Department’s Office of Foreign Assets Control (OFAC) on Tuesday designated two