A Kassam rocket fired from the Gaza Strip landed in the Eshkol region early Saturday morning, Army Radio reported.
No casualties or damage were reported in the attack.
The rocket was launched hours after two Kassams hit open fields in the Sha'ar Hanegev region, also causing no casualties or damage, Jpost reported.
Prior to the attacks, Code Red alarms sounded in communities in the area.
No group immediately claimed responsibility for the rockets.
The Kassams followed a Hamas announcement on Friday that it had managed to smuggle new types of weapons into Gaza despite the blockade. The group published photographs of some of the arms it allegedly obtained.
Izz al-Din al-Kassam Brigades published photographs of weapons including missiles with a double warhead, 107-mm caliber missiles designed to penetrate fortified structures, and a new type of armor-piercing RPG missile.
Hamas spokesman Abu Ubeida warned that the group has "thousands of fighters and good weapons capable of harming Israel."
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