Inside the Cairo massacre in 6 unbelievable scenes (PHOTOS)

CAIRO, Egypt — At least 278 people are dead and scores more injured in Egypt's bloodiest day since the uprising two years ago.

Police forces stormed a thousands-strong sit-in of supporters of the ousted President Mohamed Morsi, using live ammunition, armored bulldozers and tear gas to disperse the crowd.

More from GlobalPost: Egypt in Crisis (Full Coverage)

Egyptian photographer Mosa'ab Elshamy documented the violence.

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