Sudanese Defence Minister Awad Mohamed Ahmed Ibn Auf has declared a state of emergency for three months after confirming that Omar al-Bashir has been removed as president.
The minister, in uniform, made the announcement on state TV, noting that the military arrested al-Bashir.
He added that the army would be taking over for next two years.
Mr Ibn Ouf said the “regime” was being removed and Mr Bashir would be kept in a safe place.
He said Sudan’s constitution was being suspended, border crossings were being closed until further notice and airspace was being closed for 24 hours.
Mr Bashir is the subject of an international arrest warrant issued by the International Criminal Court (ICC), which accuses him of organising war crimes and crimes against humanity in Sudan’s western Darfur region.
However it is unclear what will happen to him following his arrest.