The government decided to reopen the Rafah Border Crossing in southern Gaza on Wednesday morning, following Hamas's release of the remains of four hostages on Tuesday night.
While the crossing was opened for people, humanitarian aid, which is entering at normal levels, is being sent into Gaza through other crossings.
The initial decision to close the crossing came as a punitive response to Hamas not upholding its side of the ceasefire and hostage deal by returning the remains of the hostages still in Gaza.
Three more hostages returned
Three of the hostages who returned Tuesday night have since been identified as Uriel Baruch, Tamir Nimrodi, and Eitan Levi.
Israeli personnel, however, have since determined that the remains of the fourth person returned do not belong to any of the hostages held by Hamas.
Israeli authorities have yet to announce any punitive measures in response.
The dispute over the return of bodies still has the potential to upset the ceasefire deal along with other major issues that are yet to be resolved.
Later phases of the truce call for Hamas to disarm and cede power, which it has so far refused to do. It has launched a security crackdown, parading its power in Gaza through public executions and clashes with local clans.
Longer-term elements of the ceasefire plan, including how Gaza will be governed, the make-up of an international force to take over there and moves towards the creation of a Palestinian state have yet to emerge.
Twenty-one bodies of hostages remain in Gaza. An international task force is meant to find them.
The deal also requires Israel to return the bodies of 360 Palestinians. The first group of 45 was handed over on Tuesday, and the bodies were being identified, said Palestinian health authorities.
Aid entry and border crossing
Reuters video showed a first group of trucks moving from the Egyptian side of the border into the Rafah crossing at dawn on Wednesday, some tankers carrying fuel and others loaded with pallets of aid.
However, it was not clear if that convoy would complete its crossing into Gaza as part of the 600 trucks that were due to enter the enclave on Wednesday - the full daily complement required under the ceasefire plan. Aid trucks entered Gaza through other crossings.
"Humanitarian aid continues to enter the Gaza Strip through the Kerem Shalom Crossing and other crossings after Israeli security inspection," the Israeli security official said.
Israel's public broadcaster Kan reported that Wednesday's aid deliveries would include food, medical supplies, fuel, cooking gas and equipment to repair vital infrastructure.
Underscoring the political challenges facing the truce, Israel's far-right National Security Minister Itamar Ben-Gvir, an opponent of the ceasefire plan, said on X that the aid delivery was a "disgrace."
"Nazi terrorism understands only force, and the only way to solve problems with it is to wipe it off the face of the earth," he added, accusing Hamas of lies and abuse over the return of hostages' bodies.
Rafah is due to be opened to Palestinian inhabitants of Gaza either entering or exiting the enclave. But those awaiting medical evacuation told Reuters they had not yet received notification to prepare for travel.
The Palestinian Authority, which governs in the Israeli-occupied West Bank, is preparing to operate the Rafah crossing into Egypt, which it previously did with EU assistance. Israel closed the crossing in 2007 after Hamas took over the enclave, but later allowed some movement through it under an agreement with Egypt.
Violence in Gaza against Hamas opponents
Several other Palestinian factions present in Gaza have backed the days-long Hamas security crackdown as it battles local clans that had tried to take over areas of the territory during the conflict.
The Popular Front for the Liberation of Palestine, one of the groups backing the Hamas crackdown, described the clans being targeted as "hubs of crime."
The ceasefire envisaged Hamas initially restoring order in Gaza and U.S. President Donald Trump, who brokered the deal, endorsed Hamas' crackdown on rival gangs, while warning it would face airstrikes if it did not later disarm.
Palestinian Authority chairman Mahmoud Abbas condemned the public executions after a video, authenticated by Reuters, showed masked gunmen shooting dead seven bound, kneeling men in a Gaza street.
Israeli forces inside Gaza have pulled back to what the truce deal calls a yellow line just outside the main cities. Israeli Defence Minister Israel Katz said it would immediately enforce any violation of the line.
This is a developing story.