The European headquarters of the United Nations is pictured in Geneva, Switzerland. File photo

A UN rights expert on Monday said there were "reasonable grounds" to determine that Israel has committed several acts of "genocide" in its war in Gaza, also warning of "ethnic cleansing".

Francesca Albanese, the UN special rapporteur on the rights situation in the Palestinian territories, said there were clear indications that Israel had violated three of the five acts listed under the UN Genocide Convention.

"The overwhelming nature and scale of Israel's assault on Gaza and the destructive conditions of life it has inflicted reveal an intent to physically destroy Palestinians as a group," she said in a report, which was immediately rejected by Israel as an "obscene inversion of reality".

Albanese, an independent expert appointed by the UN Human Rights Council but who does not speak on behalf of the United Nations, said she had found "reasonable grounds to believe that the threshold indicating the commission of... acts of genocide against Palestinians in Gaza has been met".

The report, entitled "Anatomy of a Genocide", listed those acts as: "killing members of the group; causing serious bodily or mental harm to the group's members; and deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part".

‘Outrageous accusations’

Israel's diplomatic mission in Geneva said the country "utterly rejects the report", describing it as "simply an extension of a campaign seeking to undermine the very establishment of the Jewish State".

"Israel's war is against Hamas, not against Palestinian civilians," it said in a statement, slamming Albanese's "outrageous accusations".

Israel has long been harshly critical of Albanese and her mandate, which the United States on Monday called "biased against Israel."

Washington is "aware" of Albanese's report but has "no reason to believe Israel has committed acts of genocide in Gaza," a US official told the media.

Agence France-Presse