President Muhammadu Buhari on Monday relieved the nation's service chiefs of their appointments.
Special Adviser to the President on Media and Publicity, Mr. Femi Adesina, said this while speaking to State House correspondents on Monday.
Adesina, who did not give more details, added that the Presidency was preparing a statement on the sacking, which would be made available to newsmen.
Their replacements had neither been named as of the time of writing this report.
There has been an escalation in terror attacks by Boko Haram militants in the country in recent times, leading to the killing of more than 500 people in less than four weeks.