 Hello, welcome to NewsHour from the BBC World Service. Coming to you live from London, I'm Paul Henley. The Israeli military have dropped leaflets over Gaza City telling all residents to leave and warning it's about to become a combat zone. There are estimated to be more than a quarter of a million people still living there. It's the second time people have been told to flee the city since the start of the conflict. David Mensah in Tel Aviv is spokesman for the Israeli Prime Minister's office.