Sudan's army leader Abdel Fattah al-Burhan, at war with paramilitaries, has announced a cabinet reshuffle that replaces four ministers including those for foreign affairs and the media.

The late Sunday announcement comes with the northeast African country gripped by the world's worst displacement crisis, threatened by famine and desperate for aid, according to the UN.

In a post on its official Facebook page, Sudan's ruling sovereignty council said Burhan had approved replacement of the ministers of foreign affairs, the media, religious affairs and trade.

Iran on Monday executed a member of the country's Jewish minority who had been convicted of murder, an NGO said, at a time of rising tensions with Israel.

Arvin Ghahremani was hanged in prison in the western city of Kermanshah after being found guilty of a murder during a street fight, said the Norway-based Iran Human Rights (IHR) group.

"In the midst of the threats of war with Israel, the Islamic republic executed Arvin Ghahremani, an Iranian Jewish citizen," said IHR director Mahmood Amiry-Moghaddam, adding the legal case had "significant flaws".

Hamas-run Gaza's health ministry said Monday Israeli forces were bombarding the last partially functioning hospital in the territory's north, as Israel formally notified the UN it is cutting ties with the main aid agency for Palestinians.

Vowing to stop Hamas from regrouping in northern Gaza, Israel launched a major air and ground assault nearly a month ago, a year into its war against the Islamists.

Rescuers and UN agencies say hundreds of people have been killed and the area has been left desperately short of essential supplies.

Kamala Harris courted voters angered by the Gaza war while Donald Trump doubled down on violent rhetoric with a comment about journalists being shot as the tense US election campaign entered its final hours.

The Democratic vice president and the Republican former president frantically blitzed several swing states as they tried to win over the last holdouts with less than 36 hours left until polls open on Election Day on Tuesday.

Trump predicted a "landslide", while Harris told a raucous rally in must-win Michigan that "we have momentum -- it's on our side."

Thousands of Iranians rallied Sunday by the former US embassy in Tehran to mark the 1979 hostage crisis, burning American flags and ridiculing Joe Biden and Donald Trump just two days before the US presidential election.

"There's no difference between Biden and Trump, between the donkey and the elephant," said protester Saber Danaie, 23, of the animal mascots that represent the Democratic and Republican parties in the United States.

Gaza rescuers said Israeli strikes in Gaza on Sunday killed at least 30 people, as the Israeli military pursues its offensive against Hamas in the north of the Palestinian territory.

"Since dawn today, at least 17 citizens have been martyred in Israeli attacks on homes and citizens in the northern Gaza Strip," said Gaza's civil defence agency spokesman Mahmud Bassal.

Among the dead were six in the town of Beit Lahia and four in Jabalia. They included women and children, he said.

Residents of Nur Shams camp in the occupied West Bank are fearful for their future after an Israeli raid this week damaged the UN agency for Palestinian refugees office there.

The 13,000 inhabitants of the camp near the northern city of Tulkarem depend heavily on the United Nations Relief and Works Agency for Palestine Refugees.

UNRWA notably runs two schools, a clinic and sanitation services in Nur Shams.

Stunned refugees watched as workers cleared rubble from around the office, which was almost totally destroyed in an "anti-terrorist" operation on Thursday.

Israel on Sunday pressed on with its campaigns in Lebanon and Gaza, launching several deadly strikes as Prime Minister Benjamin Netanyahu visited his country's northern border.

Netanyahu's visit came after an air strike killed at least three people near the southern Lebanon city of Sidon, the Lebanese health ministry said, and as more bombs hit the country's east.

Lebanon's health ministry said three people were killed in an Israeli strike Sunday near the southern city of Sidon, as state media reported the recovery of five bodies from the flashpoint southern town of Khiam.

The health ministry said a strike on Haret Saida, a densely populated neighbourhood near Sidon, killed three people and wounded nine others more than a month into the Israel-Hezbollah war.

Iran's supreme leader vowed retaliation on Saturday for attacks by Israel, as an Israeli military official confirmed naval commandos seized a suspected Hezbollah operative in a Lebanon raid.

The World Health Organization said four children were among six people wounded in a strike on a polio vaccination centre in north Gaza, where UN agencies have spoken of "apocalyptic" conditions in the face of a blistering Israeli assault.