Israeli military officials say they have struck four militant sites in the Gaza Strip after militants fired rockets into southern Israel, hitting a kindergarten.
There are no reports of injuries in either Gaza or the Israeli town of Sderot.
Israeli officials say their airstrikes took place early Saturday, targeting sites belonging to Gaza's militant Hamas rulers.
Such attacks and counter attacks have occurred for the past two years. The rockets fired from Gaza rarely hit building in Israel.
Thirty-four Israelis have been killed along with two Americans, an Eritrean and a Sudanese in a wave of Palestinian stabbings and other attacks since August. More than 200 Palestinians were also killed by Israel during the attacks, or while attempting to carry them out.
The violence erupted 10 months ago when rumors swept through Palestinian areas that Israel was planning to take over an East Jerusalem religious site sacred to Jews and Muslims.