U.N. slams Israel for deadly strike on Gaza shelter as war with Hamas leaves hospitals under siege

The death toll from tank fire that hit a United Nations shelter in the Gaza Strip's main southern city of Khan Younis has risen to 12, a top U.N. aid official said Thursday. Gaza's Hamas-run Health Ministry said, meanwhile, that Israeli fire had hit a large group of Palestinians waiting to receive humanitarian aid in Gaza City, killing at least 20 people and leaving scores more wounded.

Video obtained and verified by the Reuters news agency showed hundreds of people fleeing amid chaos and the sound of gunfire in Gaza City's al-Zeitoun neighborhood.