UN reports 'mass casualties' after shelter hit in Khan Younis CNN 0 147 01.25 00:57 https://www.youtube.com/watch?v=9xYJyBJvNMw + 13 https://www.youtube.com/feeds/videos.xml?channel_id=UCupvZG-5ko_eiXAup… + 14 UN reports 'mass casualties' after shelter hit in Khan Younis