Senators Ahmed Lawan and George Akume, who were favoured by the All Progressives Congress to emerge as Senate President and Deputy Senate President respectively at the May 9 inauguration of the Senate walked out of plenary in protest on Wednesday.
The senators, who walked out in company with some of their colleagues, were protesting the decision of Senate President Bukola Saraki to allow his deputy, Ike Ekweremadu to preside over plenary in his absence.
Ekweremadu presided over the Wednesday sitting because Saraki was at the Presidential Villa to attend the swearing-in of new ministers by President Muhammadu Buhari.
Lawan and three others later held a brief discussion before they left to their various offices in the new senate wing.
The plenary was the first that Ekweremadu will preside over since the inauguration of the Eighth Senate.