Palestinian medics said Friday Mohammed Dudin, 15, was killed in the village of Dura, near the city of Hebron in the West Bank.

Israel said it arrested 25 people overnight in some 200 towns, refugee camps and cities in the West Bank, totaling 330 arrests including 240 from Hamas resistance group.

Dudin was the second Palestinian killed since these raids began.

Some 1,150 sites in the territory have thus far been searched, the Israeli military said, in its mission to deal a blow to Hamas while in pursuit of Gil-Ad Shaer and US-Israeli national Naftali Fraenkel, aged 16, and Eyal Yifrah, 19.

Israel has also struck out at welfare organizations it accuses of aiding Hama. Soldiers raided 30 such institution on Thursday.

Reuters television footage showed soldiers loading files and computers from an office called "Islamic Charitable Society" in al-Khalil, onto a truck.

Israel also said it was shutting down activities of the British-based Islamic Relief Worldwide (IRW).

In the Gaza Strip, Israel carried out air strikes against three targets after rockets were fired at Israel.

There were no reported casualties in these attacks.

Palestinian President Mahmoud Abbas has condemned the kidnappings but has charged that the extent of Israel's raids amounted to collective punishment and urged they be condemned.

Hamas has not claimed responsibility for the kidnappings, but spokesman Sami Abu Zuhri said in Gaza on Thursday "regardless of who was responsible ... the Palestinian people have the right to use all forms of resistance in order to liberate land and people."

BA/BA