Israeli authorities on Tuesday intercepted the vessel, which was also carrying 21 pro-Palestinian activists, and said it would not be permitted to enter Gaza coastal waters because of security risks in the area and its existing naval blockade.

Richard Falk, the United Nations special rapporteur on human rights in the Palestinian territories, said the move was part of Israel's "cruel blockade of the entire Palestinian population of Gaza" in violation of the Fourth Geneva Convention prohibiting any form of collective punishment against "an occupied people".

Falk, an American expert on international law, said Israel's two-year blockade of Hamas-ruled Gaza restricted vital supplies such as food, medicine and fuel to "bare subsistence levels".

Read the complete article by Stephanie Nebehay. Reuters, 3rd July 2009