Civilian areas in southern Israel were heavily shelled by Palestinian terrorists in Gaza on Saturday morning, when more than 50 mortars were fired at the regional councils of Sha'ar Hanegev and Sdot Hanegev. Hamas' armed wing, the Izzadin Kassam Brigades, claimed responsibility for 10 of the mortars fired.Two Israelis sustained light injuries by shrapnel, and received medical attention, police said.RELATED:Lieberman: 'World supporting creation of terror state'Sderot residents testify before Goldstone panel Eshkol council head files UN complaint over mortar fire Palestinians shell Negev with Grads, mortar attacksA majority of the projectiles landed in open areas, local officials reported but one building sustained extensive damage in the Eshkol Regionail Council. Gaza-based Palestinian news sources reported that IDF tank shells hit the Gaza Strip on Saturday morning in response to the barrage of 50 Palestinian mortars.