Minister of Foreign Affairs Geoffrey Onyeama made the call on behalf of the Nigerian government via his verified twitter handle @GeoffreyOnyeama on Wednesday.
Onyeama said Nigeria also welcomed the urgent activation of the ECOWAS Standby Force.
“The Nigerian government unequivocally condemns the coup d’état that took place in Mali on Tuesday and demands the immediate and unconditional restoration of constitutional order.
‘We welcome the urgent activation of the ECOWAS Standby Force,” Onyeama said.
The News Agency of Nigeria (NAN) recalls that Keita and Prime Minister Boubou Cisse were arrested by the military after a mutiny on Tuesday.
The incident followed months of street protests in the volatile West African state, which was also battling Islamic insurgency.
The coup comes after several weeks of political tensions and repeated anti-government protests during which talks between the government and the opposition, led by popular cleric, Mahmoud Dicko, a former ally of Keita, failed.