An Egyptian Coptic Orthodox Christian deacon boy looks on during a Palm Sunday mass in the Samaan el-Kharaz Monastery in the Mokattam Mountain area of Cairo, Egypt, April 24, 2016.

Egyptian churches, in the southern city of Minya, say they will not hold Easter celebrations next Saturday in mourning for 45 Coptic Christians killed this week in twin bombings of churches in two cities during Palm Sunday ceremonies.

In statement on Tuesday, the Minya Coptic Orthodox Diocese said that celebrations will only be limited to the liturgical prayers “without any festive manifestations.”

Minya province has the highest Coptic Christian population in the country.

Sunday’s bombings, claimed by the Islamic State group, are the latest escalation by the extremist group – which recently vowed to step up its attacks against Egypt’s embattled Christian minority.

Egypt’s President Abdel Fattah el-Sissi declared a three-month state of emergency following the attacks.