Two rockets and a mortar were fired from Gaza into the Eshkol Region in the Western Negev Tuesday evening.
They all landed in open areas. There were no reported injuries or damage.
The rockets mark the third straight day of sporadic rocket fire on the south.
On Tuesday morning, the air force bombed a weapons manufacturing site and a weapons storage facility in the northern Gaza Strip.
The strike came after three rockets were fired at Sderot on Sunday, and three more on Monday, as the new school year was opening.
On Sunday, two rockets hit factories in Sderot’s industrial zone, injuring two people and causing damage. The attacks on Monday caused no injuries or damage.
In an unusual step, Hamas fingered a Salafi group operating in Gaza for the rocket attacks.
Known as Jamiat ul-Mujahedin Bayt al-Maqdis, the al-Qaeda-affiliated Salafi group claimed responsibility for the three rockets on Sunday.
It also reportedly criticized Hamas for clamping down on Islamic extremists in Gaza, in the wake of the August 5 Egyptian-Israeli border attack that left 16 Egyptian soldiers dead.