 Good morning, I'm Rich Preston at the BBC. Israel has dropped leaflets over Gaza City, telling residents there to evacuate and head towards the centre of the territory. Here's the BBC's Nick Beek. The message is that there are safe corridors, according to the Israelis, where people can leave Gaza City, and there are a number of places they're told to go to. There's also streets marked where people are told they'll receive safe passage. And the final message is that Gaza City remains a dangerous fighting zone.