A bomb blast has killed at least 25; it happened near St. Mark's Coptic Orthodox Cathedral in central Cairo on Sunday. The explosion in the Egyptian capital has also left 31 others injured. The blast occurred in Cairo's Abbassyia district early Sunday morning.The Coptic Church's official spokesperson Rev. Paul Halim says the explosion took place in the small church of St. Peter and St. Paul attached to the cathedral. Two days ago two bombs killed six police officers and a civilian in Giza. Copts have often faced persecution. Coptic Christians include 10 percent of Egypt's 80 million residents.