(CNN) -- At least 24 people, including 10 children, were killed when a massive tornado struck an area outside Oklahoma City on Monday afternoon, officials said. At least seven of those children were killed at Plaza Towers Elementary School in Moore, Oklahoma, police said. Emergency personnel scoured the school's rubble -- a scene of twisted I-beams and crumbled cinder blocks. The tornado was 1.3 miles wide as it moved through Moore, in the southern part of the Oklahoma City metropolitan area, the National Weather Service said. The estimated peak wind ranged from 200 to 210 mph, which would make it an EF5, the most powerful category of tornado possible, according to the agency.
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NEW: Injured toll at 353, governor says
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President Obama to visit region Sunday
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All residents of Moore have now been accounted for, mayor says
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2,400 homes were damaged in Moore and Oklahoma City
-- Insurance claims related to damage from Monday's tornado and storm in metropolitan @placeholder are likely to top $2 billion, said Collins.