Egyptian Islamists clashed with police Tuesday outside a church in Cairo, security officials said, as Christians held prayers to mark the New Year.
The Islamists, with the Muslim Brotherhood movement, had been marching when they clashed with police standing guard outside the church.
The movement of deposed president Mohamed Morsi was designated a terrorist group last week, furthering a crackdown on the Islamists since Morsi's overthrow in July.
The Islamists have blamed Christians for supporting Morsi's ouster by the military on July 3, following days of massive protests demanding the Islamist's resignation.
Police beefed up security around churches on Tuesday in anticipation of any attacks.
A suicide bomber killed more than 20 people, most of them Coptic Christian worshippers, outside a church as they marked the New Year 2011.