"These leaders, along with their families, were martyred after being directly targeted by the Zionist occupation forces' aircraft," said the Hamas statement, which also named interior ministry head Mahmud Abu Watfa and Bahjat Abu Sultan, director-general of the internal security service, among those killed.

Dalis, who was a member of Hamas's political bureau in Gaza, was elected to the movement's Gaza leadership in March 2021 and became the head of its administration in June of that year.

In November 2023, Israel claimed to have bombed a Hamas structure in which Dalis was present with other leaders who were killed.

Two Hamas sources told AFP earlier that a strike on Gaza City killed the movement's interior ministry head Abu Watfa.

Israel vowed to continue fighting in Gaza until the return of all hostages as it unleashed its most intense strikes since a January ceasefire.

The Red Cross said many medical facilities in the Gaza Strip were "overwhelmed" on Tuesday after Israel unleashed its most intense strikes on the Palestinian territory since a ceasefire was struck, according to the AFP.

"What we heard from Palestine Crescent colleagues this morning is that many medical facilities are literally overwhelmed across Gaza," Tommaso Della Longa, spokesman for the International Federation of Red Cross and Red Crescent Societies, said at a briefing in Geneva.

Six Palestinians were just confirmed killed following an Israeli airstrike on a civilian vehicle in Beit Lahiya, northern Gaza, Al Jazeera reported Tuesday.

Hamas said it blamed the US administration's "unlimited political and military support" for Israel for a deadly wave of air strikes in Gaza.

"With its unlimited political and military support for the occupation (Israel), Washington bears full responsibility for the massacres and the killing of women and children in Gaza," Hamas said in a statement.

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