Lagos - An Abuja court on Saturday nullified the election of the governor of the oil-rich Rivers state on the grounds of irregularities and ordered a fresh vote within 90 days.
Justice Suleiman Ambrosa, of the election petition tribunal sitting in Abuja, said the court was satisfied with the complaint by the All Progressives Congress (APC) candidate Dakuku Peterside that the April 11 election was fraught with violence, voter intimidation and ballot fraud.
He said the Independent National Electoral Commission of Nigeria (INEC) should call a fresh election in the disputed oil-rich state within 90 days.
Governor Nyesom Wike, of the Peoples Democratic Party (PDP), had been declared winner of the election, but the APC, which previously controlled the state, described the result as "a rape of democracy".
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Tensions have been high since former governor Rotimi Amaechi had switched sides from the PDP to the APC in 2013 and became a vocal critic of Jonathan's government.
There were widespread claims from the APC of PDP irregularities in voting in the state at the presidential election on March 28, leading to demonstrations and calls for a re-run.
The PDP in Rivers said on Saturday it would appeal against the ruling.
"No matter the degree of conspiracy by the APC-led federal government, the falsehood and gang-up against Rivers people will amount to a nullity in the end," the party said in a statement.
It said Wike would remain governor as long as an appeal is lodged within 21 days after the tribunal's ruling.