Vice President Yemi Osinbajo - who is acting as head of the country while Buhari is on holiday in London, ordered the dismissal of DSS chief Lawal Musa Daura "with immediate effect".
He said the sack of the Director General of DSS, Lawal Musa Daura was not enough, insisting that he should be arrested and prosecuted.
Seiyefa MNI hails from Bayelsa State.
With about 34 years experience, Mr. Seiyefa served in different other capacities, including being state director in Osun, Akwa Ibom, and Lagos States.
Masked State Security officers blocked the entrance of the National Assembly today.
He is also a member of the National Institute, having studied at the National Institute for Policy and Strategic Studies (NIPSS), Kuru.
Prepare for $90 oil after sanctions against Iran take effect
China, Russia and Turkey have already indicated that they would not comply with the unilateral United States sanctions. He also praised the "most biting sanctions ever imposed" and said they would "ratchet up to another level" in November.
The APC had reportedly gathered earlier in the day at the Sheraton Hotel, but shifted base when they discovered that journalists were at the hotel awaiting them when they arrived.
He also closed the regular channel of communication with the public as he refused to appoint a spokesperson for the agency throughout his tenure.
She spoke while receiving a delegation of female politicians who paid her a courtesy call led by the newly elected National Women leader of All Progressive Congress (APC), Hajia Salamatu Baiwa Umar-Eluma in Abuja on Tuesday.
Nigeria's acting president Prof.
After meeting with Osinbajo, he left the villa without speaking with reporters.
Armed men wearing the black uniform of the Department of State Security (DSS) stood at the gates of the building in the capital Abuja and were later joined by police officers, witnesses said.