Governorship candidate of the Peoples Democratic Party (PDP) in the Osun state election, Senator Ademola Adeleke, on Tuesday filed a petition at the tribunal.
Adeleke, who lost the election to the candidate of the All Progressives Congress (APC), filed the petition at the Osun Governorship Election Tribunal, challenging the outcome of the poll.
Goboyega Oyetola emerged as the winner of the keenly contested election.
Chairman of the party in Osun, Soji Adagunodo, said the party believed that the judiciary would return the mandate to Senator Adeleke.
Adagunodo said the party was battle ready with a sizeable legal team comprising senior advocates and reputable lawyers to ensure justice and reclaim the mandate.
The electoral umpire declared the September 22 Governorship election inconclusive and the APC candidate Adegboyega Oyetola was declared winner after the supplementary poll on September 27.