Sii-based Ansar Bayt al-Maqdis group, which changed its me to Sii State and declared loyalty to the IS, claimed responsibility for most of the terrorist attacks, including those against Coptic churches that killed dozens and wounded hundreds. On Sunday, a roadside bomb attack targeted a police vehicle in Cairo, killed two officers and wounded three conscripts. Later on Monday, army raids in North Sii killed three extremists and arrested 23 suspects.