The death toll from an attack on Israeli forces in Gaza has risen to 21, the country’s military said.

Israeli media say the soldiers were preparing explosives to demolish two buildings in central Gaza on Monday when a militant fired a rocket-propelled grenade at a tank nearby. The blast triggered the explosives, causing the buildings to collapse on the soldiers inside.

The incident is the largest single loss of life for the military since the war began.

Israeli prime minister Benjamin Netanyahu has vowed to press ahead until Israel crushes the ruling Hamas militant group and wins the freedom of more than 100 hostages held captive in Gaza.

Israelis are increasingly divided on the question of whether it is possible to do either.

Families of the hostages and many of their supporters have called for Israel to reach a ceasefire deal, saying time is running out to bring the hostages home alive.

On Monday, dozens of hostages’ relatives stormed a parliamentary committee meeting, demanding a deal to win their loved ones’ release.

Monday’s heavy death toll could add new momentum to calls for Israel to pause the offensive or even halt it altogether.

Large numbers of Israeli casualties have put pressure on Israel’s government to halt past military operations.

Israel launched the offensive after Hamas’ October 7th cross-border attack that killed over 1,200 people and abducted some 250 others.

The offensive has caused widespread destruction, displaced an estimated 85 per cent of Gaza’s population and left more than 25,000 Palestinians dead, according to health officials in the Hamas-run territory.

The United Nations and international aid agencies say the fighting has unleashed a humanitarian disaster with a quarter of the area’s 2.3 million people facing starvation.