The Senate hammer may fall on 10 senators over their position on the amendment of the Electoral Act.
The controversial amendment of the Electoral Act led to changes in the election sequence in the country.
In the new arrangement, the Senate and House of Representatives elections will take place first, followed by governorship and House of Assembly polls.
The presidential election will come last.
Following the adoption of conference report on the amendment, 10 senators rejected the changes, describing it as unconstitutional and exercise in futility.
The upper chamber on Tuesday mandated its Committee on Ethics, Privileges and Public Petitions, to investigate alleged unsubstantiated comments credited to Senator Ovie Omo-Agege (Delta Central) and nine others on the issue.
The Senate said the 10 senators claimed that “reordering of the election sequence targeted President Muhammadu Buhari ahead of the 2019 general election.
The nine other senators are – Abdullahi Adamu, Abu Ibrahim, Benjamin Uwajumogu, Ali Wakil, Abdullahi Gumel, Binta Masi Garba, Yahaya Abdullahi, Andrew Uchendu and Umaru Kurfi.
The Senate decision to probe the senators’ conduct followed the adoption of a motion by Senator Dino Melaye (Kogi West) on the issue.
Melaye said the 10 senators misled Nigerians by claiming that the target of the amendment was President Buhari.
The Kogi West senator, who cited Order 14 of the Senate Standing Rules, urged his colleagues to refer the matter to the Ethics, Privileges and Public Petitions Committee to investigate the claims made by senators.