The United Nations on Wednesday called the deaths in Israel's new military strikes on Gaza "appalling", as it urged all sides not to let peace "slip from our grasp".

Mediator Qatar said Wednesday it expected a US-backed ceasefire to hold in Gaza despite a "violation" as Israel carried out strikes in response to Palestinian fire.

German Foreign Minister Johann Wadephul on Wednesday expressed "deep concern" after the deadliest night of bombing in Gaza since a U.S.-brokered truce went into effect earlier this month.

Gaza's civil defense agency said the strikes had killed more than 100 people, including at least 35 children, a toll confirmed by an AFP tally of medical sources at five hospitals in Gaza.

Israel has banned the International Committee of the Red Cross (ICRC) for visiting Palestinian prisoners detained under a law targeting "illegal combatants", Defense Minister Israel Katz said on Wednesday.

"The opinions presented to me leave no doubt that Red Cross visits to terrorists in prisons would seriously harm the state's security. The safety of the state and our citizens comes first," Katz said, according to a statement from his office.

The Israeli military said Wednesday it had reinstated the Gaza ceasefire after carrying out a series of strikes on "dozens of militant targets" since the previous day.

"Following a series of strikes, in which dozens of terror targets and terrorists were struck, the IDF has begun the renewed enforcement of the ceasefire in response to Hamas' violations," the military said.

The Tunisian Forum for Social and Economic Rights (FTDES) said on Monday authorities had suspended its activities for a month, the second NGO hit by such a measure in the space of a few days.

An Israeli group campaigning for the release of hostages held in Gaza urged authorities on Tuesday to "act decisively" against Hamas, accusing the group of violating the truce by returning only partial remains of a previously recovered captive.

Gunmen killed at least two people when they opened fire on a coach along the road between Damascus and Druze-majority Sweida in southern Syria on Tuesday, state media reported, months after deadly sectarian clashes in the area.

France has resumed evacuations from Gaza, with 20 people arriving last weekend, diplomatic sources said Tuesday, months after Paris suspended the operation over a student evacuee allegedly sharing antisemitic posts.

Hamas said it would hand over another hostage body Tuesday, as the Palestinian militant group faced accusations of breaching the Gaza ceasefire after returning only the partial remains of a previously recovered captive to Israel.