The Israeli military confirmed late Friday that at least four rockets fired by Palestinians in Gaza landed in communities near the border.Just moments earlier, rocket sirens sounded in Israeli towns adjacent to the border with the Gaza Strip. The sirens were heard in Sderot and the Sha'ar Hanegev regional council.Authorities are still searching the area for signs of a rocket or missile. In all likelihood, the rockets landed in open fields. No injuries have been reported.The last time rocket sirens were activated along the Gaza frontier was in late January, when terrorists fired a rocket at southern Israel, triggering warning sirens in the Sha'ar Hanegev region on Sunday night. The rocket exploded in an open area, failing to cause injuries and there was no damage, the army said.According to the military, the incident seemed to encompass a single rocket launching. On January 1, five rockets were fired from the Gaza Strip at southern Israel, with two of the projectiles landing in Israeli territory. Three other rockets landed near the security fence inside the coastal Palestinian enclave.In retaliation to the barrage, the Israel Air Force struck four Hamas targets in Gaza.