 The Israeli military urged all Palestinians to leave Gaza City and head south on Wednesday, pressing ahead with a fresh offensive across the north, south, and center of the embattled territory that's killed dozens of people over the last 48 hours. The stepped-up activity came as U.S. Egyptian and Qatari mediators met with Israeli officials in the Qatari capital, Doha, for talks seeking a long, elusive ceasefire with Gaza's Hamas militant group in exchange for the release of dozens of Israeli hostages.