JERUSALEM, June 3 (Xinhua) -- Israeli Prime Minister Ehud Olmert vowed Sunday morning not to end a military offensive against the Palestinian militants in the Gaza Strip responsible for the firing of rockets towards Israel.

    Meanwhile, four Israel Defense Forces (IDF) soldiers were lightly to moderately wounded when Palestinian militants in Gaza fired four mortar shells at the Erez Crossing, IDF spokesperson told Xinhua.

    The injured soldiers were taken to Barzilai Medical Center in Ashkelon for treatment.

    The al-Quds Brigades, the Islamic Jihad (Holy War)'s military wing, claimed responsibility for the rocket attack.

    "The security forces will continue to act nonstop in Gaza and the West Bank. No terrorists are immune," Olmert told the weekly cabinet meeting in Jerusalem.

    "These operations are producing results and will continue so long as they contribute to the preservation of our security interests and to the defense of the citizens of Israel," he added.

    The western Negev has seen a decrease in the number of Qassam rockets fired at it by militants from Gaza. Nine rockets hit the area over the weekend, including one that damaged a Sderot house on Saturday.

    Over the weekend, IDF killed five Palestinians in the West Bankand Gaza, including three militants and two teenagers.