Former Presidents, Olusegun Obasanjo, Goodluck Jonathan, Abdulsalami Abubakar and the former head of the interim government, Ernest Shonekan, are among past leaders who have attended the National Council of State meeting on Tuesday.
Senate President, Bukola Saraki, 36 State Governors and Minister of the Federal Capital Territory (FCT) are also in attendance in the meeting presided by President Muhammadu Buhari alongside Vice President, Yemi Osinbajo.
Others in attendance are three former Chief Justices of Nigeria, namely; Muhammadu Uwais, Alfa Belgore and Mahmud Mohammed.
Former military leaders, Ibrahim Babangida and Yakubu Gowon were however absent at the meeting which started at about 11.05a.m.
Mr Obasanjo, who released a letter on Sunday, alleging plans by Mr Buhari and the All Progressives Congress (APC) to rig the 2019 general elections, was asked by Buhari to offer the opening prayer for the meeting.
NAN gathered that the meeting would deliberate on national issues, including the forthcoming general elections and possible endorsement of the appointment of the Acting Inspector-General of Police, Mohammed Adamu.
NAN also learnt that the leadership of the Independent National Electoral Commission (INEC), led by its Chairman, Prof. Mahmood Yakubu, would brief the Council on its level of preparation for the upcoming polls.
A source close to the secretariat of the Council told NAN that the leaders may also deliberate on the current security situation across the country.
The Federal Government had on Monday revealed that it was in possession of credible intelligence confirming that opposition politicians were orchestrating widespread violence to truncate the general elections.
The last meeting of the Council was held on February 22, 2018.