The head of the Coptic Christian Church has led a Good Friday service in the cathedral in Cairo in the aftermath of last Sunday's deadly bomb attacks.
Security has been tightened at churches across Egypt and Easter celebrations have been scaled back.
Both suicide bombers were Egyptians, the government said.
A three-month state of emergency was imposed following the bombings in Alexandria and the Nile Delta city of Tanta.
The attacks on Christians, who make up about 10% of Egypt's population, raised security fears ahead of a visit to Cairo by Pope Francis, the head of the Roman Catholic Church, scheduled for 28 and 29 April.
Read more: Egypt's shaken Copts mark Good Friday after double bombing - BBC News