Israel has attacked militant sites in Gaza after coming under the heaviest barrage of mortar and rocket fire from the Palestinian enclave in years.
The Israeli army said air strikes hit 35 targets, including a cross-border tunnel, belonging to Hamas and Islamic Jihad - Gaza’s main militant groups.
In Israel, an empty kindergarten was hit when militants fired more than 30 mortars earlier in the day.
The flare-up follows weeks of deadly violence on the Gaza-Israel border.