The Economic and Financial Crimes Commission (EFCC) has released a former Director-General of the Department of State Services, Mr Ita Ekpenyong, hours after his arrest.
EFCC officials supported by armed policemen had arrested Mr Ekpenyong on Thursday in his residence in Asokoro, Abuja.
Details about the reason for his arrest are sketchy but the arrest came after his successor Mr Lawal Daura, was fired by Acting President Yemi Osinbajo.
In November 2017, officials of the DSS believed to be acting under the directives of Daura prevented EFCC officials from arresting him.
At the time, he was reportedly wanted by the anti-graft agency for his alleged role in the arms scandal involving a former National Security Adviser, Col. Sambo Dasuki (retired).
He served as the head of the DSS from 2010 to 2015.
Meanwhile, the Presidency has ordered proper investigation into how the huge cash said to have been released to security agencies in the country for the 2015 Presidential election was managed and three former security heads, who held strategic positions in the country, are to face questioning by EFCC to determine their involvement or otherwise in expenditure of the cash.
Among those slated for probe are the immediate past Director-General of the DSS, Lawal Daura; Ekpenyong, and former Director-General of the National Intelligence Agency, NIA, Ayo Oke.