The government has vowed to use an "iron fist" to ensure national security after Saturday's deadly clashes in Cairo.
"We are facing the anti-revolutionary groups who are convinced that any success of the revolution was an even greater threat to their interests and so are trying to fuel confessional conflict," wrote daily Al-Ahram.
Fierce clashes broke out between Christians and Muslims in northwest Cairo's working-class district of Imbaba where 12 people were killed, scores injured and a church set ablaze.
Among the dead were six Muslims and four Christians while two bodies were still unidentified.
The two groups clashed after Muslims attacked the Coptic church of Saint Mena in Imbaba in a bid to free a Christian woman they alleged was being held against her will because she wanted to convert to Islam.
