Sudan's toppled leader Omar al-Bashir had been moved from Kober prison to a military hospital in the Sudanese capital before heavy fighting broke out there on April 15, two sources at the hospital said.
The whereabouts of Bashir came into question after a former minister in his government, Ali Haroun, announced on Tuesday he had left the prison with other ex-officials.
Both Bashir and Haroun are wanted by the International Criminal Court over alleged atrocities in Darfur.
(Reporting by Khalid Abdelaziz; Writing by Aidan Lewis)