While they may be united in negotiations over a Gaza truce with Israel, rival Palestinian movements have not set aside historic disagreements which threaten to shatter their fragile alliance, experts say.

Israel pounded Gaza on Saturday with scores of air strikes, killing 10 Palestinians, mostly women and children, and bringing down an 12-story apartment building as Egypt called for new truce talks.

Since a previous round of frantic Egyptian diplomacy collapsed last Tuesday, shattering nine days of calm, 86 Palestinians and a four-year-old Israeli boy have been killed in the violence.

Hamas has signed a proposal for the Palestinians to apply to join the International Criminal Court at which legal action could be taken against Israel, a senior official of the Islamist movement said Saturday.

"Hamas signed the document which (Palestinian) president (Mahmud Abbas) put forth as a condition that all factions approve, before he goes to sign the Rome Statute, which paves the way for Palestine's membership in the International Criminal Court (ICC)," Hamas deputy leader Mussa Abu Marzuq wrote on his Facebook page.

The Palestinian president and Hamas' exiled leader Friday urged the United Nations to draw up a "timetable" for the Israeli occupation of Palestinian territories to end, Qatar state media said.

President Mahmoud Abbas and Hamas supremo Khaled Meshaal issued the appeal during talks in Doha, as fighting continues in the Hamas-ruled Gaza Strip, Qatar's state news agency QNA said.

Israeli air strikes killed five Palestinians in the center of the Gaza Strip on Friday, two in Deir al-Balah and three in Nusseirat, the local emergency services said.

One strike in Nusseirat hit a house, killing two men aged 24 and 22, while in Deir al-Balah it landed in open farmland, Ashraf al-Qudra told Agence France-Presse.

Iran plans to send aid to the beleaguered Gaza Strip after Egypt said it would allow the shipment to enter the Palestinian territory, an Iranian diplomatic source said on Friday.

The official IRNA news agency said Cairo had agreed to transfer humanitarian aid bound for the coastal enclave, citing a foreign ministry source in Tehran.

U.N. aid workers stepped up calls Thursday for an urgent Gaza ceasefire, warning that spiralling violence endangered their ability to respond to the needs of the 1.8 million affected population.

Hizbullah deplored on Thursday the killing of U.S. journalist James Foley, describing it as a "brutal crime."

"James Foley was brutally murdered by terrorist gangs," a statement issued by Hizbullah's press office said.

The armed wing of Hamas has executed three Palestinians and arrested seven others for allegedly collaborating with Israel during the Gaza war, a website close to the movement reported Thursday.

The Majd website quoted a senior security official in the enclave as saying seven people had been arrested on suspicion of scoping out targets for Israel and that three others had been shot dead.

Venezuelan President Nicolas Maduro made a surprise visit to Cuba to meet with Fidel Castro, who praised his guest's "solidarity" with the Palestinian people and condemned the "genocide" in Gaza.

The former Cuban president and leader of the island's communist revolution said Maduro had made the visit Tuesday during a "foreign trip regarding the defense of his country's major oil interests."