Officials say that in the latest clash at least six Christians and at least five Muslims were killed.
Coptic Christians, about 10% of Egypt's population, have lived side by side with Muslims in the area for decades.
Dark forces, including the CIA's Salafist Muslims, appear to be stirring things up; reportedly the aim is to split up Egypt.
Muslims in the Inbaba neighborhood said a Christian had left the church and married a Muslim.
They said they had heard that she had been abducted and was inside the Church of St. Mina.
Muslim and Christian groups gathered.
Shots were fired from a rooftop or balcony.
Molotov cocktails were used.
There was an electrical blackout.
'Muslims' set fire to the Church of St. Mena and, later, to the nearby Church of the Virgin Mary.
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