The 'Wilayat Sinai' terrorist group uploaded Friday a video of its three attacks on army bases in Arish, North Sinai, which left 33 dead and dozens injured, via YouTube. The video shows the execution of the terror attacks, as terrorists launched mortar shells at the 101 army battalion headquarters, at the same time as two cars with planted explosives stormed the gates of the battalion to achieve maximum destructive power. 'Wilayat Sinai' is a terrorist group affiliated to Islamic State in Iraq and the Levant (ISIS) which used to be called "Ansar Bayt Al-Maqdis", before pledging allegiance to ISIS and changing its name.