By Nidal al-Mughrabi and Emily Rose GAZA/JERUSALEM (Reuters) - The United Nations, United States and Canada appealed on Tuesday for a humanitarian pause in the Israel-Hamas war to allow safe deliveries of aid to civilians stricken by shortages of food, water, medicine and electricity in the Israeli-besieged enclave. International pressure for unimpeded aid to Gaza rose as the health ministry in the Hamas-ruled territory reported that Israeli air strikes had killed more than 700 Palestinians overnight. Ministry spokesman Ashraf Al-Qidra said this was the highest 24-hour death toll in Israel s two-week-old siege. U.N. agencies were pleading on our knees for emergency aid to be let into Gaza unimpeded, saying more than 20 times current deliveries were needed to support the narrow strip s 2.3 million people amid widespread devastation from Israel s aerial blitz. The United States is negotiating with Israel, neighbouring Egypt and the U.N. to smooth emergency deliveries into Gaza, but have
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