"At least 51 people -- including at least 20 children -- were killed when a massive tornado struck an area outside Oklahoma City on Monday afternoon, officials said."
"Seven of those children were killed at Plaza Towers Elementary School in Moore, Oklahoma, according to a police official.
Early Tuesday, emergency personnel continued to scour the school's rubble -- a scene of twisted I-beams and crumbled cinder blocks.
The tornado was estimated to be at least two miles wide at one point as it moved through Moore, in the southern part of the Oklahoma City metropolitan area, KFOR reported. Video from CNN affiliates showed a funnel cloud stretching from the sky to the ground, kicking up debris."