Israelis kill dozens in fresh push for parts of north Gaza

• Heavy ground offensive, aerial bombardment affect emergency service
• UN agency says 800,000 Palestinians ‘forced to flee’ Rafah

CAIRO: Israeli troops and tanks pushed on Saturday into parts of a congested northern Gaza Strip district that they had previously skirted in the more than seven-month-old conflict, killing and wounding dozens of Palestinians, medics and residents said.

Israel’s forces also took over some ground in Rafah, a southern city next to the Egyptian border...