He said "extremists" had planted "an explosive device on the roof of Al-Haq mosque. near the Virgin Mary church". A mosque imam reported to authorities that a suspicious bag was left on the roof of the building.
Egypt's president is inaugurating Nativity of Christ Cathedral for Coptic Christians and one of the region's largest mosques.
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Chelsea star Cesc Fabregas on Saturday, January 5, played what was potentially his last match in a Blues' jersey against Championship side, Nottingham Forest .
Egyptian security forces have stepped up their presence outside churches and other places of worship ahead of New Year's Eve and Coptic Christmas, which is celebrated on January 7.
"On this day we see you have fulfilled this promise and here we are witnessing a great opening on this grand occasion", the head of the Coptic church Pope Tawadros II said.
The new church's capacity accommodates 8 thousand people, said Samuel Matias previously, adding that the cathedral will provide big buses to transport participants in the mass from Abbasiya to the New Administrative Capital, starting from 1 p.m.
More than 100 Copts have been killed in jihadist attacks since December 2016.
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Unless Australia win, India, who lead 2-1, will claim a first series victory down under since they began touring there in 1947-48. Mohammed Shami struck with the sixth ball of the day, bowling Pat Cummins with a delivery that ominously kept low.
IS claimed an assault in early November in which six Copts and one Anglican died in the central province of Minya.
Hundreds of police and soldiers have also been killed in attacks.
The jihadists killed more than 40 people in twin church bombings in April 2017, and an IS gunman in December that year killed nine people in an attack on a church in a south Cairo suburb.
His attendance on Sunday will mark the cathedral's official inauguration.
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Il y a quatre ans, la parution de Soumission avait provoqué un véritable raz-de-marée. Toutes éditions confondues, cet ouvrage s'est écoulé à près de 800 000 exemplaires .
The country has been under a state of emergency since April 2017.