The PDP commenced its case on Wednesday.
Fifteen witnesses, who had earlier submitted their statements on oath to the tribunal, appeared on Wednesday.
One of the witnesses, Abayomi Oguntimehin, said there was disorderliness in the polling unit where he voted.
He said there was no queue for the voters at the polling unit, saying people voted without proper accreditation.
Another witness, Kunle Joseph, from Igbara Oke in Ifedore Local Government Area of the state said there was no proper accreditation at his polling unit.
Speaking with reporters shortly after the court session, Mr. Oke expressed his satisfaction about the performance of his witnesses before the tribunal.
He said he has come to the tribunal to ensure that the panel do justice to his petition with the facts, evidence and witnesses presented at the court.
The former PDP national legal adviser said he will ensure that he presents facts and irregularities that pervaded the election, noting that he expects the tribunal to do proper judgement on his petition.
Mr. Oke said he is challenging the results in 15 local governments where there were irregularities, distortion, and fraud.