Governor Okezie Ikpeazu of Abia State has lost the Abia South Senatorial seat to Enyinaya Abaribe of the All Progressives Grand Alliance, APGA.
Georgina Ugwuanyi, the Returning Officer for Abia South National Elections, made the declaration before party agents at the Collation Centre in Aba.
She said Mr Abaribe got the highest number of votes in the election, having scored 49,903 votes.
According to her, the Labour Party (LP) candidate, Chinedu Onyeizu, scored 43,903, while Governor Okezie Ikpeazu of the Peoples Democratic Party scored 28,422 votes to come third.
Prior to the announcement of the election results, there were a series of protests in the state over alleged moves by the authority to alter the original results.