Christians in Cairo held a protest vigil near the city\'s Tahrir Square Monday, demonstrating against attacks on two churches in which a dozen people died. Protesters also marched on the country\'s state television facility, accusing the army of failing to protect them, the BBC reported. Christian-Muslim clashes killed 12 people and injured hundreds as the churches were burned Saturday, authorities said. Government officials said the violence began over reports that a Christian woman married to a Muslim was being held against her will in the St. Mena Coptic Orthodox Church. Soon after the church was attacked another nearby Coptic church was set on fire, witnesses said. After Saturday\'s violence, Christian leaders declared three days of mourning for people who died, the BBC reported. On Sunday, hundreds gathered outside the main state television building, calling for the removal of Field Marshal Mohamed Hussein Tantawi, leader of Egypt\'s ruling military council. Protesters returned Monday. On its Facebook page, the Egyptian army announced, \"The Supreme Military Council decided to send all those who were arrested in yesterday\'s [Saturday\'s] events, that is 190 people, to the Supreme Military Court,\" which it said should be a \"deterrent to all those who think of toying with the potential of this nation.\"