The second floor of the Defence Headquarters in Abuja was gutted by fire on Monday.
The Director Defence Information, Maj.-Gen. Jimmy Akpor, confirmed the incident.
According to him, a combined team of military and Federal Fire Service personnel had put out the fire.
“Accordingly, normalcy has returned. Investigation to determine the cause of the fire incident has commenced immediately.
“We thank the Federal Fire Service and the entire public for the continued support and goodwill to the Armed Forces of Nigeria,” he said.