Cairo, alBawaba - Egypt's President Abdul Fattah al-Sisi said that Cathedral attack was carried out by a suicide bomber called 'Mahmoud Shafik Mohammed Mostafa', 22 years old. He announced that the suicide bombing planned by seven people, while the bomber died, four arrested including one woman and two suspects on the loose. Sisi was speaking at the official funeral for the victims attended by families, churchmen and government members. A bombing in a Cairo church on Sunday near the headquarters of the Coptic pope killed at least 23 people. He stressed the need to 'redouble efforts to bring the perpetrators to justice'. He added that the state is determined to attain retribution for the victims of a bombing at Cairo's main cathedral on Sunday. On the same issue, The Grand Mufti of Egypt, the highest official of religious law in Egypt, condemned the "deplorable terrorist attack". Nabil Naem, a former Jihadist and expert on radical Islmists, told al-Bawaba that the suicide bomber is a student from Faiyum (100 kilometres (62 miles) southwest of Cairo) radicalized by Jihadist movements