Police sources said on Friday a mortar shell killed a woman and four children in Sheikh Zuwaid, North Sinai, Al Bawaba News reported. The victims were carried to Al Arish Central hospital, medical and security officials said. Since the ouster of former president, Mohamed Morsi, July 2013, a series of terrorist attacks targeted security personnel and civilians leaving hundreds of victims. The Islamic State (IS)-linked Wilayat Sinai terrorist group has repeatedly claimed responsibilities for the attacks.