A Reuters investigation last year traced Algunade's ownership to the brother of Mohamed Hamdan Dagalo, the deputy head of Sudan's sovereign council.

In crisis since losing most of its oil wealth with the secession of the south in 2011, Sudan has experienced an acute shortage of foreign currency. Gold trade is now the main source of the country's foreign reserves.

(Reporting by Khalid Abdelaziz; Writing by Maha El Dahan; Editing by Jan Harvey)