Kuwait requested on Friday an urgent Arab foreign ministers meeting to discuss "the deteriorating situation" in the Gaza Strip, its Arab League representative said, as Israeli air strikes pound the Palestinian enclave.

Israel's aerial military campaign targeting rocket-firing militants in Gaza has killed around 110 Palestinians since it began early Tuesday.

Egypt said Friday its efforts to halt violence in the Gaza Strip have met with "stubbornness", as it appealed to the international community to intervene to end the deadly conflict.

Israel's aerial military campaign targeting rocket-firing militants in Gaza has killed at least 100 Palestinians and wounded more than 500 since it began early Tuesday.

Israel's aerial bombardment of Gaza claimed its 105th Palestinian life on Friday as Hamas pounded central Israel with rockets and Washington offered to help broker a truce.

Diplomatic efforts to end the hostilities gathered pace, with U.S. President Barack Obama phoning Israeli Prime Minister Benjamin Netanyahu.

Turkish Prime Minister Recep Tayyip Erdogan on Friday accused Israel of a policy "based on lies" over its aerial bombardment of Gaza, in his latest vehement criticism of the Jewish state.

Speaking to supporters in Istanbul, Erdogan pointed out that 100 Palestinians had now been killed in the Israeli campaign while no Israeli's had died due to Palestinian attacks.

Egypt's security forces seized 20 Grad rockets being smuggled in from the Gaza Strip through a tunnel by militants in northern Sinai, security officials said Friday.

The rockets, along with their launch pads, were seized late Thursday after a firefight between security forces and militants in the town of Rafah bordering the Palestinian enclave, they said.

A group of 34 charities and other non-governmental organizations signed a statement Friday urging an end to the deadly conflict between Israel and Palestinian militant group Hamas.

The statement was signed by groups including ActionAid, CARE, Oxfam and Save the Children and urged the international community to step up efforts to find a lasting solution to disputes in the region.

Benjamin Netanyahu, initially accused by Israel's most ardent hawks of dithering over Hamas rocket fire, appears to have found at least a temporary political balance with his punishing air campaign against Gaza.

But rivals on the far-right are still snapping at him, some demanding that he strangle the densely populated and impoverished Palestinian enclave by cutting off electricity, fuel and food, and others insisting he send in troops and reoccupy it.

Israel could be violating the laws of war by bombing Palestinian homes in Gaza, the U.N.'s human rights office said Friday, as the death toll from the Israeli strikes rose to 100.

"We have received disturbing reports that many of the civilian casualties, including of children, occurred as a result of strikes on homes," said spokeswoman Ravina Shamdasani.

The United Arab Emirates pledged $25 million in humanitarian aid Thursday to "support the steadfastness" of Palestinians in Gaza where Israeli strikes have killed more than 70 people in three days.

The Emirati Red Crescent will supervise delivery of the aid, WAM state news agency said, adding that the aid organization will also set up a field hospital in Gaza "to help the victims of the Israeli aggression".

Egypt opened its Rafah border crossing to Gaza on Thursday to receive wounded Palestinians as Israel pounded the enclave with air strikes, an official at the border said.

Hospitals in north Sinai, which borders Gaza and Israel, have been placed on standby to receive the Palestinians, Egypt's official MENA news agency reported.