Seventy Palestinians were killed and more than 200 wounded by Israeli fire on the city of Khan Younis in southern Gaza, Gaza's Health Ministry said on Monday.
It said some of the wounded were in a "dangerous condition.”
Another strike hit outside Al-Aqsa Hospital in the central town of Deir-Al-Balah, where many people were living in tents on the street, killing one person and wounding three.
The attacks came as the Israeli military ordered the evacuation of part of a crowded area in the Gaza Strip it had designated a humanitarian zone, saying it is planning an operation against Hamas militants there. The order triggered a new flight of Palestinians, many of whom had taken refuge there just in the past weeks.
The Health Ministry said the toll from Israel’s nine-month war against Hamas in Gaza has surpassed 39,000 Palestinians killed and 89,800 wounded.