DEIR AL BALAH, Gaza Strip (AP) — An Israeli airstrike on Thursday killed at least 27 Palestinians sheltering at a school in northern Gaza and wounded 70 more, said Health Ministry spokesman Zaher al-Wahidi, as Israeli forces have expanded their strikes and evacuation orders across the war-torn territory in recent days.

Israel’s military operation in the Gaza Strip is expanding to seize “large areas,” the defense minister said, while officials at hospitals inside the Palestinian territory said Israeli strikes overnight and into Wednesday had killed more than 30 people,

Israel resumed its military offensive in Gaza in March, blaming Hamas for rejecting a new US proposal to extend the ceasefire and free the remaining hostages. Since then, the Israeli military has launched waves of airstrikes on the besieged territory, killing hundreds of Palestinians and forcing many more to evacuate.