Hours after Israeli airstrikes killed several people including a leader of militant organization Palestinian Islamic Jihad (PIJ) in the Gaza Strip, several rockets were fired back at Israel from Gaza, according to media reports. Air raid sirens were sounded in several Israeli cities, but the rockets went down in open terrain or were intercepted by the Iron Dome missile defence system, according to the Israeli military. The PIJ’s military arm said on Friday evening that the rockets were fired in retaliation for the killing of PIJ commander Taisir al-Jabari. “We’re attacking Tel Aviv and the cit…