Gaza militants fired at least one rocket at southern Israel on Thursday night as the Jewish state wound up celebrations marking the anniversary of its creation, the army said, Al Arabia reported.
Warning sirens sounded in "the southern communities of Sderot and Gevim following a rocket attack originating from the Gaza Strip. No damage reported," a military statement said.
It provided no further details.
Israel went to war against Hamas, the de facto power in Gaza, last summer with the aim of stamping out cross-border rocket fire.
Then 50-day conflict killed 2,140 Palestinians, most of them civilians, and 73 people on the Israeli side, most of them soldiers.
In December Israeli warplanes struck the strip for the first time since an August 26 ceasefire went into effect, after a rocket hit the Jewish state.
There were no casualties on either side.