A Department of Foreign Affairs (DFA) official has expressed optimism that the period for the release of those taken hostage by the Hamas would be extended, which is expected to happen during the conduct of humanitarian truce between Israel and the militants.

"Let's pray that it [the agreement to release hostages] works between both sides. It could continue beyond four days," DFA Undersecretary Eduardo Jose de Vega said in an interview with CNN Philippines.

De Vega said the government is expecting that the release of hostages by the Hamas will still happen in the immediate time amid reports that the truce and the release of hostages is delayed.

Israeli national security adviser Tzachi Hanegbi was reported saying that the release, although on track, would not happen until Friday at the earliest.

“The truce will start today at 4 pm (Manila time). The actual start of release of hostages is Friday,” de Vega said in a text message to Manila Bulletin.

He said the government is still not expecting that the two Filipinos who are believed to be among those taken captive will be part of the first batch to be released as Israeli women and children will be prioritized.

But he expressed hope that the Filipino hostages would be included in the upcoming batches.

"There's no indication that foreign nationals, except maybe dual US-Israeli nationals, will be included, but it will still be a positive step," he said.

"It also shows that the hostages are alive or otherwise Hamas would not be making this deal. So there is hope for our kababayans," he added.

Ten people are expected to be initially released from the 50 individuals who are set to be freed, de Vega said.

De Vega said the Philippines is grateful to the Qatari government for its mediation between Israel and Hamas that have been at war for more than a month.