At least 15 Palestinians, including eight children and two women, have been killed in an Israeli strike near a medical point in central Gaza, a hospital there says.

Al-Aqsa Martyrs Hospital said the strike hit people queueing for nutritional supplements in the town of Deir al-Balah. Graphic video from the hospital showed the bodies of several children and others being treated for their wounds.

The Israeli military said it was checking the reports.

Another 26 people were reportedly killed in strikes elsewhere in Gaza on Thursday, as Israeli and Hamas delegations continued negotiations for a new ceasefire and hostage release deal at indirect talks in Doha.

Despite optimism expressed by the US, which is acting as a mediator along with Qatar and Egypt, they do not so far seem to have come close to a breakthrough.

On Wednesday night, a senior Israeli official told journalists in Washington that it could take one or two weeks to reach an agreement.

The official, who was speaking during a visit to the US by Israeli Prime Minister Benjamin Netanyahu, also said that if an agreement was reached on a 60-day ceasefire, Israel would use that time to offer a permanent end to the war that would require Hamas to disarm. If Hamas refused to disarm, Israel would "proceed" with military operations, they added.

Earlier, Hamas issued a statement saying that the talks had been difficult, blaming Israeli "intransigence".

The group said it had shown flexibility in agreeing to release 10 hostages, but it reiterated that it was seeking a "comprehensive" agreement that would end the Israeli offensive.

The Israeli military launched a campaign in Gaza in response to the Hamas-led attack on southern Israel on 7 October 2023, in which about 1,200 people were killed and 251 others were taken hostage.

At least 57,680 people have been killed in Gaza since then, according to the territory's Hamas-run health ministry.

Most of Gaza's population has also been displaced multiple times. More than 90% of homes are estimated to be damaged or destroyed; the healthcare, water, sanitation and hygiene systems have collapsed; and there are shortages of food, fuel, medicine and shelter.