Unknown assailants opened fire on a Central Security checkpoint in Arish on Sunday, causing no casualties. An eyewitness said that a four-by-four vehicle carrying gunmen targeted the checkpoint from three different directions. Army forces responded to the attack while aircrafts hovered above the area. Twenty-one people have been killed while 122 were wounded in armed attacks in the Sinai Peninsula since the army's ouster of Islamist President Mohamed Morsi on July 3 following mass anti-regime demonstrations. The victims include seven civilians and army and police personnel. Since Morsi was ousted, reports of armed attacks in the Sinai Peninsula have increased. Source:Aswat Masriya