Palestinian militants in the Gaza Strip have reportedly fired five rockets over the border into Israeli territory but there is no indication of casualties.
One rocket damaged a school in the southern city of Ashkelon but the building was closed at the time, the Israeli military say.
A second hit open ground outside the city and three fell just beyond Gaza without causing damage, they add.
There were no immediate claims of responsibility for the attacks.
Both Israel and the main Palestinian militant group in Gaza, Hamas, declared unilateral truces after Israel ended its three-week Gaza offensive on 17 January.
Several rocket strikes and other attacks from Gaza have been reported since then, apparently involving smaller militant groups.
Israel has also carried out air strikes.