The All Progressive Congress (APC) has overwhelmingly won the governorship election in Imo state amid a boycott by some voters.
Hope Uzodinma of the All Progressives Congress won with more than 540,000 votes – his closest rival had 71,000.
Some Imo residents were seen queuing to buy water rather than going to vote as a strike has cut supplies of drinking water and electricity.
Saturday’s elections in three states saw reports of violence and rigging.
The results of elections for the powerful position of governor in Bayelsa Kogi states are expected later on Sunday.
In Imo state, Samuel Anyanwu of the main opposition Peoples Democratic Party (PDP) came second with 71,500 votes, with the Labour Party’s Athan Nneji Achonu third on 64,000.
Some clashes were reported in Bayelsa state during voting on Saturday. An electoral official was abducted a day before the polls before being released.
In Kogi state, the electoral body, says it’s investigating opposition allegations that the results had been written before voting had even started.