Sudan Denies U.S. Chemical Weapons Claim as Washington Expands Sanctions

June 29, 2026.

Sudan’s UN Ambassador Al-Harith Idriss told the Security Council on June 26 that Washington had not shared evidence of alleged Sudanese Armed Forces (SAF) chemical weapons use, despite a year of bilateral discussions.

Idriss said a U.S. technical team had collected four regional soil samples in Sudan, but had not shared findings with Khartoum or sought a ruling from the Organisation for the Prohibition of Chemical Weapons (OPCW).

U.S. Senior Adviser Massad Boulos accused the SAF of deploying chemical agents and said Washington was imposing a second sanctions round over the alleged use and Sudan’s failure to comply with the Chemical Weapons Convention, Sudan Tribune reported. Sudan denies the charge.

The U.S. determination predates June 26. In May 2025, the State Department formally found under the Chemical and Biological Weapons Control and Warfare Elimination Act of 1991 that Sudan used chemical weapons in 2024. Reuters reported that the measures included export restrictions and denials of U.S. government credit. Khartoum says Washington acted on intelligence, including soil samples, that Sudan has not seen.

Unlike standard OFAC designations, which target individuals, companies and networks that can be rebranded or replaced, the chemical-weapons track attaches pressure to the Sudanese state itself. That makes it politically harder for any army-aligned successor government to restore normal financial relations while the U.S. determination remains in force. The core allegation remains disputed: Washington has made a formal legal determination, while Sudan says the evidence has not been shared and no OPCW ruling has established the claim.