At least 21 people were killed and dozens more injured after a bomb went off at a Coptic Christian church in Egypt during a Palm Sunday service.

The explosion ripped through St. George's Church Sunday morning in Tanta, only 50 miles from Cairo.

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The deputy minister of health said the current death toll was 21, but other reports indicated at least 25 people were killed.

No terror group claimed responsibility for the attack, although it is believed to be ISIS, which targets Egypt's Christian minority.