The Latest: Nigeria's election death toll rises to 53

The Latest on Nigeria's election (all times local):

2 p.m.

A Nigerian analysis unit says the death toll has risen to 53 in violence related to Saturday's presidential election.

SBM Intelligence is compiling the toll for a civil society monitoring group, based on informants and local media reports.

Head of research Cheta Nwanze says the group has confirmed that an attack on Saturday in the northeast claimed by the Islamic State West Africa Province extremist group was deadlier than first thought, with between 17 and 21 people killed.

The overall toll of 53 is based on the lower number of 17 dead.

Final election results are expected late Tuesday or Wednesday as President Muhammadu Buhari leads by more than 1 million votes.

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7:10 a.m.

Nigerians are starting a second day of state-by-state announcements of presidential election results in a race that has been described as too close to call.

President Muhammadu Buhari leads by more than 280,000 votes as he seeks a second term in Africa's largest democracy. Eleven of 36 states have been announced, with the process resuming at 10 a.m. Tuesday.

Election observers say Saturday's vote was hurt by a weeklong postponement and significant delays in the opening of polling stations.

Nigerians now wonder whether Buhari or top challenger Atiku Abubakar will accept a loss or challenge the results.

Abubakar's party already has alleged manipulation of results, which the ruling party has rejected and called an attempt to discredit the election.

Nigeria's some 190 million people say they pray for peace.