Nigeria’s two major opposition parties on Tuesday called for the presidential election to be canceled and rerun, saying that it had been compromised by rigging and widespread violence.
The election over the weekend in the West African nation — the most populous on the continent, with 220 million people — was the most wide open in years, with a surprise third-party candidate putting up an assertive challenge.
On Tuesday, the chairmen of the two opposition parties — the People’s Democratic Party and the Labour Party — called for the head of the government’s electoral commission to resign, even as the commission continued to release results.
With about one-third of the 36 states reporting results by Tuesday afternoon, the candidate of the governing All Progressives Congress party, Bola Ahmed Tinubu, appeared some distance ahead of his rivals in the count. Some 87 million people were registered to vote, but results from the first tabulations suggested low voter turnout.
“This is not a credible election,” said Iyorchia Ayu, the chairman of the People’s Democratic Party, Nigeria’s main opposition party, at a joint news conference on Tuesday afternoon in Abuja, the capital. “It is not acceptable.”
International observers who monitored the election reported delays, technical hitches and violence.
The Independent National Electoral Commission had said in a statement on Monday that it took “full responsibility” for the logistical problems and delays.
As of Tuesday afternoon, Atiku Abubakar of the People’s Democratic Party trailed behind Mr. Tinubu with 32 percent of the votes, and Peter Obi, the so-called “youth candidate” of the opposition Labour Party, had 17 percent.
On Monday, Mr. Obi pulled off an unexpected victory in Lagos State, home to the country’s largest city and traditionally a stronghold of Mr. Tinubu, who was its governor for eight years.
