epa04496699 Egyptian security forces are seen at the site of bombing at the Helwan University, southern Cairo, Egypt, 20 November 2014. Reports state five policemen were injured when assailants riding a car hurled a home-made bomb at them as they were standing guard at the state-run Helwan University. EPA/EMAN HELAL / ALMASRY ALYOUM EGYPT OUT *** Local Caption *** 51309221 *** Local Caption *** 51309221