An estimated 500,000 Israelis have hit the streets in protest throughout Israel the military after six more captives were found dead in Gaza. They had been killed in the Israeli air strikes on Gaza.

The protesters are demanding a ceasefire deal and Israel’s main labour union has called for a strike.

Scuffles between the protesters and security forces were reported on Sunday night in one of the largest anti-government demonstrations in Israel since the Gaza war began 11 months ago.

The protesters chanted “Now! Now!” and demanded that Israeli Prime Minister Benjamin Netanyahu reach a ceasefire with Palestinian group Hamas to bring the remaining captives home.

Many Israelis blocked roads in Tel Aviv and demonstrated outside Netanyahu’s office in West Jerusalem.

In a statement, the Hostages and Missing Families Forum, which represents the families of captives held in Gaza, said the death of the six hostages was the direct result of Netanyahu’s failure to secure a deal to halt the fighting and bring their loved ones home.

Gil Dickmann, a cousin of Carmel Gat, whose body was among those returned, urged Israelis to put more pressure on the government. “Take to the streets and shut down the country until everyone returns. They can still be saved,” Dickmann posted on X.

Gideon Levy, a columnist with Israel’s Haaretz newspaper, told Al Jazeera that Netanyahu has been defending the right-wing parties in his government that are against any concessions to Hamas.

“They [the parties] could not care less about the hostages,” he said.

Levy stressed that within Netanyahu’s Likud Party, the largest group in the government, Netanyahu wields a lot of power and the party supports him.

“Therefore the challenges from within the government are very limited,” he said. “The real, only possible, challenge would be the streets, but it is too early to judge.”

“Therefore the challenges from within the government are very limited,” he said. “The real, only possible, challenge would be the streets, but it is too early to judge.”

Union calls for general strike

Meanwhile, in a first since October 7, Israel’s largest trades union federation, the Histadrut, has called for a general strike to pressure the government into signing a ceasefire deal.

The union said Ben Gurion Airport, Israel’s main air transport hub, would be closed from 8am (05:00 GMT) on Monday, as it aimed to shut down or disrupt major sectors of Israel’s economy, including banking and healthcare.

“A deal is more important than anything else,” said Histadrut chief Arnon Bar-David. “We are getting body bags instead of a deal.”

He said he was backed by Israel’s main manufacturers and entrepreneurs in the high-tech sector. The alliance of some of the most powerful voices in Israel’s economy reflected the scale of public anger over the deaths of the six captives.

Municipal services in Israel’s economic hub Tel Aviv will also be shut for part of Monday.

The Manufacturers Association of Israel said it backed the strike and accused the government of failing in its “moral duty” to bring the captives back alive.

“Without the return of the hostages, we will not be able to end the war, we will not be able to rehabilitate ourselves as a society and we will not be able to begin to rehabilitate the Israeli economy,” said association head Ron Tomer.

Israeli opposition leader and former Prime Minister Yair Lapid said he supported the strike.

But Finance Minister Bezalel Smotrich has asked the Attorney General Gali Baharav-Miara to submit an urgent request to courts to block the planned nationwide strike.

In his letter, Smotrich argued that a strike had no legal basis since it aimed to improperly influence significant policy decisions of politicians on issues related to state security.

He also said that a broad strike – which would shut the country including outgoing flights – has significant economic consequences which would cause unnecessary economic damage in wartime.

Truce negotiations between Israel and Hamas have dragged on for months, and many blame Netanyahu for failing to reach a deal.

The Israeli military has killed at least 40,738 people and wounded 94,154 in its war on Gaza since October 7. An estimated 1,139 people were killed in Israel during the Hamas-led attacks on October 7, with some 250 people seized by the group.

Israel’s army has acknowledged the difficulty of rescuing dozens of remaining captives and said only a deal can bring a large-scale return.