GAZA STRIP - In response to Palestinian rocket fired on southern Israel Saturday night, the Israel Air Force targeted two terrorist sites in southern Gaza, the IDF Spokesperson's Office announced.

Residents of several communities near where the rocket exploded headed for shelter when the Color Red warning siren sounded.

The rocket landed in an open area in the Hof Ashkelon (Beach) Regional Council, with no personal injury or property damage.

"The IDF will not tolerate any attempt to harm the citizens of the State of Israel and will continue to operate against those who use terror.

"The IDF holds Hamas solely responsible for maintaining peace and quiet in the Gaza Strip," the spokesperson's statement read.

Palestinians in the Gaza Strip have fired 50 rockets at southern Israeli communities in the past four months.

Since the IDF's three-week military incursion into Gaza, which ended in January 2009, Palestinians have fired more than 330 rockets and mortar shells at Israel - much fewer than before Operation Cast Lead.