The aftermath of an explosion that took place at a Coptic church on Sunday in Tanta, Egypt, April 9, 2017. REUTERS/Mohamed Abd El Ghany

A forensics personnel inspects the site of an explosion that took place at a Coptic church on Sunday in Tanta, Egypt, April 9, 2017. Islamic State claimed responsibility for the attacks, which also injured more than 100 people and occurred a week before Coptic Easter. REUTERS/Mohamed Abd El Ghany

The aftermath of an explosion that took place at a Coptic church on Sunday in Tanta, Egypt, April 9, 2017. At least 44 people were killed in Egypt in bomb attacks at the cathedral of the Coptic Pope and another church on Palm. REUTERS/Mohamed Abd El Ghany

The aftermath of an explosion that took place at a Coptic church on Sunday in Tanta, Egypt, April 9, 2017. The attacks in the northern cities of Tanta and Alexandria that also left 126 people wounded came at the start of Holy Week leading up to Easter. REUTERS/Mohamed Abd El Ghany

The aftermath of an explosion that took place at a Coptic church on Sunday in Tanta, Egypt, April 9, 2017. Suicide bombers struck hours apart at two Coptic churches in northern Egypt, killing 44 people and turning Palm Sunday services. REUTERS/Mohamed Abd El Ghany

A man sits at right as a suicide bomber detonates at the front gates into St. Mark's Coptic Cathedral in Alexandria, Egypt, April 9, 2017. Bombs exploded at two Coptic churches in different cities in northern Egypt as worshippers were celebrating Palm Sunday, killing dozens of people and wounding many more in an assault claimed by the Islamic State group.(Egyptian Interior Ministry via AP)