Several thousand Israelis demonstrated outside the country's defence ministry in Tel Aviv, demanding action from the government to secure the release of hostages still held in Gaza.
On Saturday, Israeli media reported that the government was issuing orders to call up tens of thousands of reservists ahead of an expanded offensive in Gaza.
According to Israel's public broadcaster, the security cabinet is scheduled to meet on Sunday to approve the expansion of the military offensive in Gaza.
Israel resumed major operations across Gaza on 18 March amid deadlock over how to proceed with a two-month ceasefire that had largely halted the war.
The Israeli government said its renewed offensive in Gaza is aimed at forcing Hamas to free its remaining captives, although critics charge that it puts them in mortal danger.
A statement from the Hostages and Missing Families Forum argued that "any escalation in the fighting will put the hostages ... in immediate danger".
It added: "The vast majority of the Israeli public views the return of the hostages as the nation's highest moral priority.
"There is still a critical window to reach an agreement that saves lives and prevents further loss," it said.
One of the Tel Aviv demonstrators, 64-year-old Arona Maskil, told Agence France-Presse: "We're here because we want the hostages home. We're here because we don't believe that the war in Gaza today, currently, is justified at all.
Three babies killed in Israeli strike in Gaza
Gaza's civil defence agency said on Saturday that an overnight Israeli strike on the Khan Younis refugee camp killed at least 11 people, including three infants aged one or less.
Agency spokesman Mahmud Bassal say they were killed in the "bombardment of the Al-Bayram family home in Khan Younis camp" at around 3am local time.
An Israeli army spokesperson confirmed the strike, saying it targeted a "Hamas member".
Israel has blocked all aid deliveries to Gaza since 2 March, prompting warnings from UN agencies of impending humanitarian disaster.
Israel carries out strikes on two Syrian cities
Israeli strikes targeted the vicinity of Syria's Damascus, Hama and Daraa countryside late on Friday, Syrian state news agency SANA reported.
The strikes on Damascus countryside killed one civilian and injured four others in Hama, SANA added.
Israel's repeated strikes on Syria act as a warning to the new Islamist rulers in Damascus, which Israel views as a potential threat on its border.
The Israeli army confirmed the strikes on Syria on Friday, saying it targeted "a military site, anti-aircraft cannons, and surface-to-air missile infrastructure".
The Israeli army has previously said it targeted Syria's military infrastructure, including headquarters and sites containing weapons and equipment, since mainly Sunni Muslim Islamist fighters toppled president Bashar al-Assad in December.
Earlier on Friday, Israel bombed an area near the presidential palace in Damascus, in its clearest warning yet to Syria's new Islamist-led authorities of its readiness to ramp up military action, which has included strikes it said were in support of the country's Druze minority.
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