Reacting to the outcome of the supplementary election in a statement on Friday, the organisation said a major political tragedy was underway with major consequences for the nation.

“We call on the international community to monitor happenings in Osun state. A major political tragedy is underway with huge consequence for the nation,” the statement read in part.

The candidate of the All Progressives Congress (APC) Gboyega Oyetola emerged victorious after he got 255,505 votes, while the Peoples Democratic Party (PDP) candidate, Ademola Adeleke secured 255,023 votes.

Going into the supplementary election, Oyetola had trailed Adeleke by 353 votes.

However, his votes from Thursday were enough to help him overturn the deficit and be returned as winner of the keenly contested election.

But the Adeleke Campaign Organisation rejected the results as it described the exercise as a sham.