Protesters in Egypt continue to voice their anger after a bomb attack killed 21 Christians on New Year's Day.

Hundreds of Christians gathered for a third day outside The Virgin Mary Church in Shubra District of Cairo. They were encircled by security forces to prevent the demonstration from spreading.

Investigators believe a suicide attacker carried out the bombing on the Saints Church in Alexandria as worshippers were emerging from midnight Mass.

Meanwhile a set of unidentified remains from the bomb attack are being investigated for links to the attacker. So far, no group has claimed responsibility for the attack, the worst on Egyptian Christians in a decade.