The three countries said on Friday that the ceasefire talks in Doha were “serious and constructive”.

The current round of talks began on Thursday amid growing fears of a regional war after Israel killed a senior Hezbollah commander in Beirut and Hamas political chief Ismail Haniyeh was assassinated in Tehran.

Friday’s statement reiterated previous statements by the mediators rejecting any delay in implementing an agreement on a ceasefire and the release of prisoners.

“The way is now clear for this outcome: lives will be saved, the people of Gaza will be helped and tensions in the region will be reduced,” the three countries said on Friday.

The announcement did not provide details of the latest proposal, but noted that it builds on an agreement put forward by US President Joe Biden in May.

The US-backed plan envisages a multi-stage attempt to end the war, beginning with a six-week pause in fighting that will allow the release of some Israeli prisoners held in the besieged enclave, as well as Palestinian prisoners in Israeli jails.

In the second phase, fighting would cease permanently and all remaining Israeli prisoners would be released.

The final part of the agreement will involve the reconstruction of the Gaza Strip, which was devastated by the Israeli war.

“The working groups will continue technical work on the details of implementation in the coming days, including arrangements for implementing the agreements, comprehensive humanitarian provisions and details related to hostages and prisoners,” the mediators’ joint statement added.

Hamas has stressed that it would only agree to an agreement that would lead to a permanent ceasefire, the complete withdrawal of Israeli soldiers from Gaza and a “serious” prisoner exchange.

The Hamas leadership sees the new US proposal as a response to and fulfillment of Israel’s conditions, a senior Hamas source privy to the details of the negotiations told CNN. The source accused Israel of adding new conditions to delay the deal.

Speaking to Al Jazeera on Friday, Hamas official Osama Hamdan reiterated the group’s position and accused Israel of undermining the talks.

Hamdan stressed that the group, which is not directly participating in the talks, does not yet have a clear picture of the status of the negotiations, but its representatives have no reason to believe that Israel is sending positive signals.

“The mediators are still talking about bridging the differences, but it is clear that the Israeli side is setting further conditions and talking about new issues,” Hamdan said.

“I think they are trying to undermine the process.”

If there were “positive signals” from Israel, Hamas would be willing to take part in the talks. However, this has not happened so far, Hamdan continued.

A senior Hamas official, Izzat al-Rishq, also told Reuters that Israel had “not adhered to what was agreed in previous talks,” citing statements made by mediators.

Hamas sources also told Middle East Eye on Friday that “the main efforts of the Israeli delegation were aimed at incorporating Benjamin Netanyahu’s conditions into Biden’s proposal.”

The sources added that “Hamas categorically rejects Netanyahu’s conditions.”

Earlier, the Gaza Strip’s Health Ministry announced that the total death toll from Israel’s campaign of death, destruction and genocide in the blockaded territory had exceeded the horrifying mark of 40,000.

Hossam Badran, a member of Hamas’ political bureau, stressed in a statement late Thursday that Israel’s ongoing military operations were an obstacle to progress in achieving a ceasefire.