DEIR AL BALAH, Gaza — 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.

At least 17 people, some from the same family, were killed after an airstrike hit the southern city of Khan Younis, according to hospital staff. Hours later, people were still searching through the rubble, looking for survivors.

The attack came a day after Israeli strikes killed at least 100 Palestinians. Hundreds more have died in the past two weeks, as Israel has intensified operations, intended to pressure Hamas to release remaining hostages it took during its attack on Israel in October 2023. On Friday, Israel said it had begun ground activity in northern Gaza, in order to expand its security zone.

Israel’s military had issued sweeping evacuation orders for parts of northern Gaza before expected ground operations. The U.N. humanitarian office said around 280,000 Palestinians have been displaced since Israel ended the ceasefire with Hamas last month.

— The Associated Press