United Nations Secretary-General Antonio Guterres is "deeply alarmed" at Sunday's strike by Israeli forces on the al-Ahli Arab Hospital in Gaza, his spokesperson has said.

"Under international humanitarian law, wounded and sick, medical personnel and medical facilities, including hospitals, must be respected and protected," the UN chief's spokesperson said.

He said the attack dealt "a severe blow to an already devastated healthcare system in the Strip", adding there was strong concern that medical supplies are running low as well as food and water.

Israeli Prime Minister Benjamin Netanyahu has announced that "intense talks" are underway to secure the release of hostages in besieged Gaza, as public pressure mounts following his decision to abandon a ceasefire agreement unilaterally and resume the war, according to a statement from his office reported by the Maariv newspaper.

It came shortly after Hamas revealed it is reviewing a new ceasefire and prisoner exchange proposal submitted by mediators, the group said in a statement.

The US State Department approved the potential sale of Eitan Powerpack engines and related equipment to Israel, the Pentagon said.

"The United States is committed to the security of Israel, and it is vital to US national interests to assist Israel to develop and maintain a strong and ready self-defence capability," the Pentagon said in a statement, adding the proposed sale will enhance Israel's capability to meet "current and future" threats.

Hamas said that it would respond to a new Israeli proposal for a Gaza ceasefire after internal consultations, with a senior official telling AFP news agency the proposal crossed a "red line" on disarmament.

"Hamas affirms that its leadership is studying ... will present its response as soon as the necessary consultations are completed," the Palestinian armed group said in a statement.

Mohsen K. Mahdawi was arrested at the US Citizenship and Immigration Services (USCIS) office in Colchester, Vermont, as he was preparing to take the citizenship interview.

Egypt sent an Israeli proposal to Hamas, calling for a temporary ceasefire in besieged Gaza and the start of talks to secure a permanent truce, according to Egypt's Cairo News channel.

The channel reported that Egypt received the Israeli plan and forwarded it to Hamas, which is now awaiting a response from the Palestinian resistance group.

The Houthi group reported US forces conducted 15 air strikes that targeted the Raghwan and Medghal districts in Yemen's central Marib Governorate, according to the Al-Masirah TV channel.

The Houthi-run channel provided no details on casualties or damage.

More than 9,500 Israeli academics, teachers, and medical professionals, as well as approximately 1,000 parents, signed petitions urging the government in Tel Aviv to secure the release of hostages held in besieged Gaza, even if it meant ending the war in the enclave.

According to the Israeli newspaper Haaretz, approximately 3,500 academics signed a petition supporting a previous letter from Israeli Air Force reservists demanding the return of the hostages and the end of the war.