Authorities in Hamas-ruled Gaza accuse Israeli forces of a "heinous massacre" with a strike on a school they say killed almost 30 people, many of them children.

Israel has killed at least 112 Palestinians over the past day, including dozens of children and elders slaughtered in three separate attacks on schools where hundreds of displaced families took shelter.

DEIR AL BALAH, Gaza (AP) — Israeli strikes killed more than a dozen people in the Gaza Strip early Friday, as Israel sent more ground troops into the Palestinian territory to ramp up its offensive against Hamas.