50-year-old Christian schoolteacher Gamal Tawfiq was shot in the head on his way to El-Samran School in el-Arish, Northern Sinai. His killers rode motorbikes. Also this week militants killed local Christian vet Bahgat Zakher. Last month a Christian merchant was gunned down by militants in his shop, and five Coptic Christians had their throats slashed in a killing spree. In December IS bombed a Cairo church killing 27 people and wounding 40+. IS called it a 'martyrdom operation' targeting 'infidels' and 'apostates'. Ishaq Ibrahim of the Egyptian Initiative for Personal Rights said, ‘We are witnessing an increase of Christian killings that I think will turn into a repetitive pattern in el-Arish’. On 20 February IS released a video calling for the slaughter of Egyptian Christians. See: