Israeli air strike kills 25 in southern Gaza

An Israeli air strike on a school-turned-shelter in southern Gaza killed at least 25 Palestinians, as heavy bombardment in the north forced the closure of medical facilities in Gaza City (Abdel Kareem Hana/AP)

An Israeli air strike on a school-turned-shelter in southern Gaza killed at least 25 Palestinians on Tuesday, as heavy bombardment in the north forced the closure of medical facilities in Gaza City and sent thousands fleeing in search of increasingly elusive refuge.

Israel’s new ground assault in Gaza’s largest city is its latest effort to battle Hamas militants regrouping in areas the army previously said had been largely cleared.