The three-story structure crumpled into a pile of concrete slabs Wednesday. About 100 nursery and primary school students are believed to have been inside. At least 37 people have been rescued.
Vote-counting has started in the much-anticipated election, a week after it was postponed by officials who blamed logistical challenges. Candidates include incumbent President Muhammadu Buhari.
Officials blame "challenges." In Africa's most populous country, President Muhammadu Buhari is trying to hold on to his position, and opposition leader Atiku Abubakar is his fiercest challenger.
The U.S. president's words encouraging soldiers to open fire at rock-throwing migrants appeared in a tweet from Nigeria's military, which has reportedly shot at Shiite demonstrators.