Senators electrd on the platform of the Peoples Democratic Party on Wednesday staged a walk out of plenary.
This followed the defection of one of them, Senator Yele Omogunwa, to the All Progressives Congress.
Omogunwa is representing Ondo South Senatorial District.
He had before the Ondo State governorship election, won by the APC’s candidate, Rotimi Akeredolu, defected to the party.
Wednesday’s announcement in the Senate was to formally inform his collleagues.