New York, July 28 -- United Nations High Commissioner for Human Rights Volker Turk has expressed alarm over the scale of destruction and suffering in Lebanon orchestrated by Israeli military operations, warning that documented violations of international humanitarian law "may amount to war crimes and could constitute crimes under international law."Speaking to reporters after concluding his visit to Lebanon, Turk said Israeli airstrikes, shelling and the use of explosive weapons in densely populated areas had resulted in "extensive civilian casualties, widespread destruction and large-scale displacement."The UN rights chief said he visited a school converted into a shelter for around 1,000 displaced people, where residents described the dev...