But bulldozing or blowing up houses and wells was deemed insufficient. With its back to the wall, the Haganah (Israeli army) upped the ante and unleashed a clandestine campaign of poisoning certain captured village wells with bacteria – in violation of the Geneva Protocol […] Over the weeks, the well-poisoning campaign was expanded to regions beyond the Tel Aviv-Jerusalem road and included Jewish settlements captured or about to be captured by Arab troops, and then to inhabited Arab towns, to facilitate their prospective conquest by the Haganah or to hinder the progress of the invading Arab armies.
Benny Morris (Jewish historian) “‘Cast thy bread’: Israeli biological warfare during the 1948 War”, 2022