On Palm Sunday, 9 April 2017, twin suicide bombings took place at St. George's Church in the northern Egyptian city of Tanta on the Nile delta, and Saint Mark's Coptic Orthodox Cathedral, the principal church in Alexandria, seat of the Coptic papacy. At least 45 people were reported killed and 126 injured. Amaq News Agency said the attacks were carried out by a security detachment of ISIS.