The United States on Thursday imposed sanctions on Sudan's leader, army chief Abdel Fattah al-Burhan, accusing him of choosing war over negotiations to bring an end to the conflict that has killed tens of thousands of people and driven millions from their homes.

Sudan's army chief has ordered an investigation into allegations that his troops carried out widespread atrocities after recapturing the capital of Gezira state from their paramilitary rivals. Gen Abdel Fattah al-Burhan's move comes after widespread concern that civilians - including foreign nationals - were killed after the seizure of Wad Madani.

The United States has sanctioned the leader of the Sudanese Armed Forces, accusing Gen. Abdel Fattah al-Burhan of destabilizing the war-torn Northeast African nation and undermining peace efforts.