Dozens killed in Israeli airstrikes across Gaza Strip

In a statement, the Israel Defense Forces (IDF) said Hamas militants were present at the school. There was no immediate comment on the strike in Mawasi but the army said the air force had struck about 40 targets in Gaza on Tuesday, including sniping and observation posts, military structures and buildings rigged with explosives.

The targeting of Deif and subsequent deadly attacks on Gaza appear to have contributed to an impasse in ceasefire and hostage-prisoner swap negotiations being held in Qatar and Egypt. The talks stalled on Saturday, Egyptian mediators told local media.

Disagreements over the identities and numbers of the Israeli hostages and Palestinians held in Israeli jails have repeatedly scuppered truce talks. The situation has been complicated by the fact that in May Israel seized control of the Rafah border crossing into Egypt, which Hamas and international delegations insist must be returned to Palestinian control.

Also on Monday, the EU added to a wave of international measures against extremist Israelis, announcing new sanctions on three well-known Israeli settler leaders in the occupied West Bank and a pro-settlement group, Regavim, which was founded by the current Israeli finance minister, the far-right Bezalel Smotrich.