Meanwhile, Reuters reports that authorities are questioning seven people about the attack:
An Iraqi group linked to al Qaeda threatened the Church in Egypt with attack in November and a statement on an Islamist website, posted about two weeks before the Alexandria bombing, urged Muslims to attack Coptic churches in Egypt and elsewhere.
One security source said seven people were being detained, and 10 had been released after questioning.
"There are people being held and investigated. This is part of the investigations to reveal the mysterious circumstances of the incident and gather information," said the second source, who declined to specify how many were being detained.
ORIGINAL POST: The death toll remains at 21 after yesterday's church bombing in Alexandria, Egypt (some video is graphic). Though there has been no claim of responsibility, President Hosni Mubarak told his nation that "foreign hands" are using the attack as a means to destabilize the country.
As the politics of the bombing continues to play out, Christians and Muslims gathered last night to protest Saturday's bombing. Interestingly, the protest is seen by some as a threat to Christian and Muslim relations, with one paper suggesting