On Palm Sunday, 9 April 2017, twin suicide bombings detonated 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. In the aftermath of the attacks, Egyptian President Sisi summoned the country's security council. At least 41 people were killed and more than 136 injured. The Islamic State of Iraq and the Levant – Sinai Province (also called ISIS or ISIL) group claimed responsibility for the attacks in an online statement.