Four police conscripts were wounded Monday in an explosion targeting armored vehicle of security forces in North Sinai's Sheikh Zuweid city, Al Bawaba News reported. The wounded elements, whose names have not been released yet, were transferred to the Al-Arish Military Hospital for treatment. Since September 2013, Egyptian army and police have been carrying out an ongoing military campaign against terrorist groups in Sinai after they claimed responsibility for several deadly attacks targeting Egyptian military and police personnel.