While major questions remain about the future of Hamas and Gaza, the exchange of hostages and prisoners raised hopes for ending the deadliest war ever between Israel and the militant group.

CNN’s Jeremy Diamond breaks down growing frustrations in Israel over Hamas’ slow return of the deceased hostages and Israel’s plans to limit aid in response.

After the release of the last living hostages and Palestinian prisoners and detainees, the tenuous ceasefire in Gaza was holding Tuesday while questions remain over other key parts of a U.S. plan for the region.

The last 20 living Israeli hostages held in Gaza have been released and reunited with their families, marking a pivotal step in the U.S.-brokered peace deal between Israel and Hamas. Under the terms of the agreement,

Hamas war was tested Tuesday as the slower-than-hoped return of deceased hostages from Gaza prompted an Israeli military agency to declare a “violation” of the truce agreement.

All 20 living hostages held by Hamas and hundreds of Palestinian prisoners held by Israel walked free Monday as part of a ceasefire pausing two years of war that decimated the Gaza Strip and killed tens of thousands of Palestinians.

Israel and Hamas moved ahead on a key first step of the tenuous Gaza ceasefire agreement by freeing hostages and prisoners, raising hopes that the U.S.-brokered deal might lead to a permanent end to the two-year war that ravaged the Palestinian territory.