An explosion at Cairo's Coptic Orthodox cathedral complex Sunday kills at least 20 people and wounded 35 others. MENA, Egypt's official news agency, reports an assailant threw a bomb into a chapel at St. Mark's, in Cairo's Abbassia district.
Blast at Cairo’s Coptic Cathedral Kills 20

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Scene after the explosion inside the “Botrosia” church in Abbassya in Cairo, Egypt, Dec. 11, 2016.

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Priests, nuns and some of copts, who were attending the mass, are looking inside the “Botrosia” church in the cathedral complex following the blast in Abbasssya in Cairo, Dec. 11, 2016.

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A botch of blood seen on the floor of the “Botrosia” Church inside the cathedral complex in Cairo, Dec. 11, 2016.

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Priests and curate check the attacked church “Botrosia” following a blast in Cairo, Dec. 11, 2016.