Israel launched a wave of airstrikes across the Gaza Strip early Tuesday, saying it was hitting Hamas targets in its heaviest assault in the territory since a ceasefire took effect in January.

The strikes killed more than 400 people and wounded over 500, according to Gaza’s Health Ministry.

Prime Minister Benjamin Netanyahu said he ordered the strikes because of a lack of progress in talks to extend the ceasefire. Officials said the operation was open-ended and was expected to expand. The White House said it had been consulted and voiced support for Israel’s actions.

Hamas warned that Israel’s new airstrikes breached their ceasefire and put the fate of hostages in jeopardy.

The surprise attack shattered a period of relative calm during the Muslim holy month of Ramadan and raised the prospect of a full return to fighting in a 17-month war that has killed tens of thousands of Palestinians and caused widespread destruction across Gaza.

Here’s the latest:

Freed Israeli hostages voice anger and alarm over resumption of war

In stories on Instagram shared by Israeli media, several Israelis released from Hamas captivity in the first phase of the recent ceasefire made desperate appeals to the government to prioritize the release of the hostages and resume negotiations.

“Returning to fighting? Did you listen to a word of what we, the returnees released in the last deal, have been saying to you? Do you see us?!” wrote former hostage Omer Wenkert. He added that “the sense of being forsaken is the strongest I have ever felt.”

Romi Gonen, who was among the first hostages freed in the last ceasefire, said she “will never forget the moment in captivity when I heard the booms after the (first) deal collapsed and realized I would not be freed anytime soon.” She wrote, “I beg you, the people of Israel, we must continue to fight for them. And the government of Israel – get them out! This is the most urgent thing.”

A Palestinian health official says Tuesday is the deadliest day of the war in Gaza

Zaher al-Waheidi, head of the records department in Gaza’s Health Ministry, said at least 263 of the 404 people confirmed dead so far Tuesday were women or children 18 and under. He described it as the deadliest day in Gaza since the start of the war in October 2023.

Saudi Arabia has condemned ‘in the strongest terms’ Israel’s attacks in Gaza

A statement from the Saudi Foreign Ministry called for an immediate ceasefire and for the protection of civilians.

Before the outbreak of the war in October 2023, Saudi Arabia appeared to be close to forging diplomatic relations with Israel in a potentially historic U.S.-brokered agreement. The war put that process on hold. Saudi Arabia says it will not normalize relations with Israel without a halt to the fighting and a path toward establishing a Palestinian state.

Mediator Qatar condemns Israel’s resumption of war in Gaza

Qatar has strongly condemned Israel’s resumption of its war against Hamas in the Gaza Strip.

The Arab country has served as a key mediator with Hamas and helped broker the ceasefire that took hold in January.

Qatar’s Foreign Ministry on Tuesday condemned “the resumption of the Israeli occupation’s aggression against the Gaza Strip,” saying it threatens regional stability.

Egypt, which also played a key role in brokering the ceasefire, has also condemned the wave of heavy strikes Israel launched early Tuesday.

Israeli far-right lawmaker Itamar Ben-Gvir’s party returns to Netanyahu’s government

Israeli far-right lawmaker Itamar Ben-Gvir’s party says it is returning to Prime Minister Benjamin Netanyahu’s government.

His party had left the coalition after Netanyahu agreed to a ceasefire in the Gaza Strip in January. Ben-Gvir’s return comes after Israel launched a wave of airstrikes. It strengthens Netanyahu’s ruling coalition.