GAZA: Palestinians in northern Gaza reported fierce air and artillery strikes early on Monday as Israeli troops backed by tanks pressed into the enclave with a ground assault that drew increased international calls for the protection of civilians. Israeli air strikes hit areas near Gaza City's Shifa and Al-Quds hospitals, and Palestinian militants clashed with Israeli forces in a border area east of the city of Khan Younis, in the enclave's south, Palestinian media reported. There was no comment from Hamas or the Israeli military on the fighting...