Emefiele, who was granted bail on Tuesday, was forcefully re-arrested by DSS officers after openly clashing with prison officials who attempted to take him into custody in line with the court's ruling. He has been held by the DSS since June 10.

The DSS has "initiated detailed investigations into the matter. This is with a view to identifying the role played by specific persons as well as undertaking disciplinary actions if necessary," Peter Afunanya, a spokesman for agency, said in a statement.

The agency, which notes the "undue overzealousness" by everyone involved in the incident, "has tremendous respect for the judiciary" and will not deliberately undermine it, he added.

(Reporting by Elisha Bala-Gbogbo; editing by Diane Craft)