A rocket fired from Lebanese territory hit northern Israel late Saturday, the army said on the 47th day of a war against the Islamist movement Hamas in and around Gaza.

"The rocket that was fired from Lebanon hit the Upper Galilee," the army said in a statement, correcting a previous communique that said the rocket had hit east of Acre.

An Israeli air strike levelled an apartment building in the heart of Gaza City late Saturday, wounding at least 18 people, four of them children, emergency services and witnesses said.

Residents in the 11-story building were called 10 minutes before the attack and told to evacuate, after which at least two missiles slammed into the complex, levelling it totally, witnesses said.

Future developments in the Gaza conflict -- attrition warfare, a ground incursion or a ceasefire -- depend on events on the ground, the status of the forces on both sides and internal dynamics, analysts say.

-- What is the current balance of power in the conflict?

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.

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.

Israel on Friday removed from two government Twitter accounts a harrowing image of U.S. journalist James Foley about to be beheaded, after the tweets sparked widespread controversy online.

The still, taken from a video of the killing of the freelance reporter in Iraq by a masked Islamic State jihadist, was posted on Prime Minister Benjamin Netanyahu's official account on Thursday.

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.

Hamas gunmen executed 18 Palestinians accused of collaborating with Israel in the heart of Gaza City on Friday, as the deadly war between the Islamist movement and Israel reached day 46.

The Palestinian emergency services say another 75 people have died in Gaza since hostilities resumed on Tuesday following a nine-day truce. In Israel, two civilians have been wounded by direct rocket attacks.

Britain, France and Germany have launched a fresh bid at the U.N. to end six weeks of violence in Gaza, after Israeli warplanes killed three top Hamas commanders, inflicting a heavy blow on the movement's armed wing.

The European initiative on Thursday came as fighting flared on the ground and an Egyptian-led effort to broker peace talks teetered on the verge of collapse.