A Kassam rocket was fired into southern Israel from the Gaza strip on Saturday caused serious damage to a public building in the Sha'ar Hanegev Regional Council area. No one was injured in the attack.
The attack prompted a "Color Red" warning in neighboring Sderot.
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Security forces have undertaken a search for the remains of the rocket.
The attack came a day after a Grad missile fell in central Ashkelon causing serious damage. The Israeli Air Force retaliated for the Grad missile attack Friday night, targeting Hamas-linked objectives in the Gaza Strip.
A senior Hamas  member was killed and 8 people were wounded, several in serious condition in the IAF strike.
According to Palestinian sources, air force aircraft targeted the Tel al-Hawa neighborhood and Ansar security compound in western Gaza City, which served as a training site for Hamas commanders and was used as headquarters for high-rank Palestinian Authority officials in the past, such as Yasser Arafat.
Other targets included sites in Dir al-Balah and Rafiah.
The IDF Spokesperson reported that the IAF hit three targets: a Hamas-linked terror activity site in the northern part of the Strip, a weapons-manufacturing warehouse in central Gaza and a weapons-smuggling tunnel in the south.