No sign of this story in any Anglophone medium yet.
I like this guy Ziegler. He's been in trouble before, for talking bluntly about Israel. An AJC front called "UN Watch" has a whole dossier of frothings about Herr Ziegler, which makes diverting reading.
Rough translation of the Corriere item:
Iraq: UN accuses coalition of violating Geneva Convention
Geneva -- The armed forces of the US-led coalition in Iraq have been accused by the UN of violating the Geneva Convention. According to Jean Ziegler, UN special rapporteur on the right to food, the practice of blocking food and water in order to force Iraquis to abandon guerrilla strongholds before an attack is a "gross [palese] violation" of international law because it also causes suffering to innocent civilians who are unable to flee from the war zone.