the thousands. they are expected to heed that call. >> we'll go to stefanie dekker, live from gaza. we are looking at a live shot of the gaza skye line. stephanie was tells us earlier that the offensive that was planned to hit northern gaza has begun. how is it playing out? >> well, it's quiet at the moment. we are hearing that there was one air strike in an area towards the north. people still extremely on edge, waiting braced for this to happen. many people have left their homes, the u.n. agency for palestinian refugees tells us that more people are streaming in. some are remaining up north, waiting, perhaps, they say - one girl we heard from said she'd wait to see what would happen, and if needed there was a shelter in the north. they'd start moving. people waiting to see when this will happen. they are expecting something harsh. it will be short and temporary, it will be strong. they did give 12 o'clock. perhaps they'll give it a little more time to make sure people can leave if they want to leave. it put people on edge, more than they are. >> why are they focussing on that area in particular. tell us more about israel's cop