Israel-Gaza updates: Netanyahu says Israel 'can't be flexible' on some issues

President Joe Biden says negotiators are "closer than we've ever been" on reaching a deal and "much, much closer" than they were three days ago.

"We are closer than we ever been. I don't want to jinx anything," Biden told reporters in the Oval Office. "We may have something, but we're not there yet. But it's much, much closer than it was three days ago."

Three children have presented with suspected acute flaccid paralysis, a common symptom of polio, weeks after poliovirus was detected in environmental samples from Khan Younis and Deir al-Balah.

International aid groups are calling for temporary humanitarian pauses in order to launch polio vaccination campaigns across the Gaza Strip at the end of August and September to prevent the spread of the circulating variant type 2 poliovirus.

"During each round of the campaign, the Palestinian Ministry of Health (MoH), in collaboration with the World Health Organization (WHO), the United Nations Children’s Fund (UNICEF), the United Nations Relief and Works Agency for Palestine Refugees (UNRWA) and partners, will provide two drops of novel oral polio vaccine type 2 (nOPV2) to more than 640 000 children under ten years of age," the WHO and UNICEF said in a statement.

Hamas said it supports a humanitarian pause in order to vaccinate thousands of children against quadriplegia.

"At least 95% vaccination coverage during each round of the campaign is needed to prevent the spread of polio and reduce the risk of its re-emergence, given the severely disrupted health, water and sanitation systems in the Gaza Strip," the aid groups said.

A new "bridge proposal" was presented to Israel and Hamas, according to a joint statement from Qatar, Egypt and the U.S.

Israeli sources told ABC News progress has been made in negotiations and some of the gaps have narrowed. But Hamas said that the Israeli side did not abide by what was agreed upon on July 2 and Netanyahu even backed down from what was stated in the Israeli paper on May 27.

More talks will be held in Cairo next week to bridge the gap and complete the deal, the three countries said.

"Working teams will continue technical work over the coming days on the details of implementation including arrangements to implement the agreement's extensive humanitarian provisions as well as specifics relating to hostages and detainees," Qatar, Egypt and the U.S. said.

"There is no further time to waste nor excuses from any party for further delay," the countries said.

Israel is calling on Palestinians sheltering in the humanitarian zone in northern Khan Yunis and eastern Deir al Balah to temporarily evacuate to the adjusted humanitarian area.

"The adjustment is being made following accurate intelligence information according to which the Hamas terrorist organization has established terrorist infrastructure in an area defined as a Humanitarian Area," the Israel Defense Forces said in a statement.

Hamas said forcing thousands of Palestinian civilians to repeatedly displace has led to their overcrowding in harsh conditions that threaten their lives and exacerbate the humanitarian crisis.

"Forcing our people in northern Khan Yunis and eastern Deir al-Balah by the criminal Zionist occupation army to flee to the so-called 'humanitarian and safe areas' is nothing but another means to deepen the collective punishment and genocide that our people have been subjected to for more than ten months. The occupation uses displacement as a weapon in its war against defenseless civilians, in an attempt to break their will and increase their human suffering," Hamas political bureau member Izzat al-Rishq said in a statement.

Israel has continued to conduct strikes on humanitarian areas despite official designations that they are safe zones for civilians.