The United Nations says up to one hundred fifty thousand people are trapped in old city of Mosul in Iraq, where Islamic State extremists want to keep them as human shields and are shooting people trying to flee. <br/><br/>In an interview with AFP news, the UN Deputy Special Representative and Humanitarian Coordinator in Iraq, Lise Grande, said conditions in the old city are desperate with very little food and no clean water. She said the United Nations expects the battle for the Old City to start within days.<br/><br/>Nearly eight hundred sixty thousand people have already fled from Mosul due to fighting between the US-backed Iraq forces and Islamic State group since October last year.<br/><br/>