Sudan’s military ruler has issued a decree ordering the dissolution of the Rapid Support Forces, the rival paramilitary group that’s been fighting Sudan’s army since April. The decree came amid continued heavy fighting in Sudan’s capital region. On Tuesday, witnesses said artillery attacks by the Sudanese army killed at least 32 people and injured dozens more in the city of Omdurman.

On Wednesday, U.S. Ambassador to the United Nations Linda Thomas-Greenfield visited Sudanese refugees in Chad, where she announced new U.S. sanctions on leaders of the RSF over widespread human rights abuses.