Israeli jets bombed the Gaza Strip early Wednesday despite a nominal ceasefire, killing one combatant of the Islamic Jihad group, a military source said, DPA reported.
Two rockets were fired from Gaza into Israel shortly after the attack.
The ceasefire between Israeli and Palestinian forces was broken Monday when several rockets were fired from Gaza.
The latest round of clashes broke out Thursday after a series of bomb attacks in the south of Israel. Almost 150 rockets and grenades have been fired into Israel, whose air force has flown 30 sorties against Palestinian territories.
Including the original attacks, Israel has suffered nine dead and around 50 wounded. Sixteen Palestinians were reported to have been killed, and more than 50 injured.
Islamic Jihad, a smaller militant group than Hamas, has been blamed by Israel for breaking ceasefires earlier this year.