One week ago, US President Donald Trump was given a hero's welcome in Israel after securing the Gaza ceasefire and exchange of Israeli hostages for Palestinian prisoners.
But the days since have shown just how precarious the ceasefire is, and Sunday brought its biggest test so far.
The Israel Defense Forces (IDF) launched a series of deadly strikes across Gaza, after two soldiers were killed in an attack it blamed on Hamas. An Israeli security official announced the suspension of aid deliveries.
It appears US pressure ensured the truce was not derailed and that Israel's crossings with Gaza reopened on Monday. Now it is clear mediators must stay closely involved to shore up the deal and settle key issues on the future of Gaza and Hamas.
Already, the president's special envoys Steve Witkoff and Jared Kushner are back in the region while Hamas negotiators are meeting Egyptian mediators and Palestinian factions in Cairo.
All are expected to discuss the second phase of Trump's 20-point peace plan, which involves deploying an international stabilisation force in Gaza, the eventual withdrawal of the IDF and critically, the disarmament of Hamas.
Palestinians and Israelis have been shaken by the latest breakdown. From the start of the war I was with him 24 hours a day, I never left him, bereaved father, Shadi Abu Obeid told the BBC in Khan Younis as he fought back tears at the funeral of his 14-year-old son Mohammed early on Monday.
Mohammed was killed with two others in an Israeli strike on a tent in al-Mawasi. The IDF would not comment on who or what was specifically being targeted.
At least 45 Palestinians were killed, local hospitals say, after the IDF said it struck dozens of Hamas terror targets throughout the Gaza Strip.
The BBC understands that several members of Hamas's armed wing, including a commander, were killed in a strike on a makeshift café in central Gaza. However, footage from other locations showed civilians, including children, among the dead.
Trump's envoys – who played a key role in negotiations with Hamas – had been expected in Israel to meet Prime Minister Benjamin Netanyahu, prior to the latest events.
Before they left the US, the two men gave an interview to 60 Minutes on CBS, in which they described how they had broken with diplomatic protocols to hold direct talks with Hamas leaders during ceasefire talks in Sharm el-Sheikh in Egypt.
They said this was intended to give guarantees that fighting would not resume after Israeli hostages were returned. Kushner - Trump's son-in-law – said the president had been very, very comfortable with such an approach.
He also said the signs were that Hamas was acting in good faith to return the bodies of deceased hostages – a main point of contention with Israel, prior to Sunday's events, threatening the ceasefire. Sixteen bodies have yet to be handed back. Hamas has said it has recovered another corpse which will be handed back when conditions allow.
Speaking to journalists on Air Force One on Sunday, President Trump stressed the truce remained in place and that we want to make sure it's going to be very peaceful.
However, Israeli commentary warns of the deal's weaknesses, with analysts noting that vague wording left significant loopholes regarding the fate of Hamas fighters stranded in areas controlled by Israel.
With a combination of domestic pressures and external factors looming, both sides face a complex path ahead as they navigate the current hostilities and strive for a sustainable peace.
