Negotiators worked feverishly on Friday to renew the pause in fighting between Israel and Hamas in Gaza as a senior Israeli official reiterated plans to resume the war unless the Palestinian militant group agreed to release more hostages.

After two last-minute extensions, the enemies marked on Thursday the seventh day of a Qatari-mediated truce with the exchange of eight hostages and 30 Palestinian prisoners as well as the infusion of more humanitarian aid into the shattered Gaza Strip.

Egyptian and Qatari mediators, who succeeded in achieving the earlier deals, were working to negotiate a further truce of two days, Egypt's official state media agency said.

Mark Regev, an adviser to Israeli Prime Minister Benjamin Netanyahu, said Israel was open to continuing the ceasefire if Hamas committed to further hostage releases. Israel had previously set the release of 10 hostages a day as the minimum it would accept to pause its assault.

"We're ready for all possibilities [...] Without that, we're going back to the combat," he said on CNN.

Before the prior truce was due to expire early on Thursday, Hamas and its ally, the armed wing of Palestinian Islamic Jihad, put their fighters on alert for a resumption of hostilities.

Israel has sworn to annihilate Hamas, which rules Gaza, in response to the Oct. 7 rampage by the militant group, when Israel says gunmen killed 1,200 people and took 240 hostages.

Israel retaliated with intense bombardment and a ground invasion. Palestinian health authorities deemed reliable by the United Nations say more than 15,000 Gazans have been confirmed killed.

When the ceasefire first came into effect a week ago, Israel was preparing to turn the focus of its operation to southern Gaza after its relentless seven-week assault to the north.

Mediators faced a daunting challenge on Friday in achieving another truce extension as the obstacles may be greater. With fewer Israeli women and children left in captivity, lengthening the truce could require setting new terms for Hamas to release Israeli men, including soldiers.

The militant group could in turn seek to have Palestinian male prisoners handed over. So far, three Palestinian prisoners have been freed for each Israeli hostage.

One of Qatar's lead negotiators, career diplomat Abdullah Al Sulaiti, who helped broker the truce through marathon shuttle negotiations, acknowledged in a recent Reuters interview the uncertain odds of keeping the guns silent.

"At the beginning I thought achieving an agreement would be the most difficult step," he said in an article that detailed the behind-the-scenes efforts for the first time. "I've discovered that sustaining the agreement itself is equally challenging."

Thursday's releases brought the totals freed during the truce to 105 hostages and 240 Palestinian prisoners.

The truce has allowed some humanitarian aid into Gaza after much of the coastal territory of 2.3 million people was reduced to wasteland in the Israeli assault.

More fuel and 56 trucks of humanitarian supplies entered Gaza on Thursday, Israel's defense ministry and the Palestinian Red Crescent Society said.

Workers unload humanitarian aid destined for the Gaza Strip via Rafah border area, during a temporary truce between Palestinian Islamist group Hamas and Israel, at Al Arish airport, in Al Arish, Egypt, on Nov. 30, 2023. (Reuters/Mohamed Abd El Ghany)

But deliveries of food, water, medical supplies and fuel remain far below what is needed, aid workers say.

At an emergency meeting in Amman, Jordan's King Abdullah on Thursday urged UN officials and international groups to pressure Israel to allow more aid into the beleaguered enclave, according to delegates.

US Secretary of State Antony Blinken, in Israel during his third visit to the Middle East since the war began, agreed that the flow of aid into Gaza was not sufficient.

Blinken said he told Netanyahu that Israel cannot repeat in south Gaza the massive civilian casualties and displacement of residents it inflicted in the north.

"We discussed the details of Israel's ongoing planning and I underscored the imperative for the United States that the massive loss of civilian life and displacement of the scale that we saw in northern Gaza not be repeated in the south," Blinken told reporters in Tel Aviv.

"And the Israeli Government agreed with that approach," he said. This would include concrete measures to avoid damaging critical infrastructure such as hospitals and water facilities and clearly designating safe zones, he said.