U.N. leader Ban Ki-moon arrived in Cairo on Monday to bolster Egypt-mediated efforts for a ceasefire in Gaza which officials said could end the conflict before it worsens with a possible Israeli ground invasion.

Ban will inject heavyweight impetus into the peace effort, meeting Foreign Minister Mohammed Kamel Amr and Arab League chief Nabil al-Arabi before flying to see Israeli Prime Minister Benjamin Netanyahu and Palestinian chief Mahmoud Abbas.

Hamas chief Khaled Meshaal said Monday his movement is committed to efforts to secure a truce with Israel, but insisted the Jewish state must lift its six-year blockade of the Gaza Strip.

"We are committed to a ceasefire, but Israel must stop its aggression," Meshaal said. “We don't want an escalation, because Hamas and all resistance factions are courageous but they are also rational," he added.

Turkish Prime Minister Recep Tayyip Erdogan accused the United Nations on Monday of failing to act over the deadly Israeli air bombardments of Gaza, calling Israeli a "terrorist state" that "massacres innocent children".

He accused the U.N. Security Council of "turning a blind eye" to the suffering of Muslims across the world and called for "sincere action" to end Israel's strikes on Gaza, where 90 Palestinians died since violence erupted on Wednesday, while three Israelis have been killed in militant rocket fire.

Progressive Socialist Party leader MP Walid Jumblat noted on Monday that Palestine will remain at the heart of the conflict in the Middle East, noting that the "Arab Spring" has arrived in its territories.

He said in his weekly editorial in the PSP-affiliated al-Anabaa magazine: “The inevitability of history proves that all peoples will earn their freedom, rights, and dignity.”

Rival Palestinian factions Fatah and Hamas said on Monday they have decided to end infighting in a show of solidarity in the West Bank over the Gaza crisis, an AFP reporter said.

"From here, we announce with other (factional) leaders, that we are ending the division," senior Fatah official Jibril Rajoub told a crowd of about 1,000 who gathered for a demonstration in Ramallah, the West Bank's political capital.

Foreign Minister Adnan Mansour will be part of the Arab League delegation, which will visit the Gaza Strip on Tuesday in a show of support for the territory in the face of Israeli air strikes, As Safir daily reported Monday.

“The purpose of the visit is to deliver a message of solidarity and support to the Palestinian people. It is the least we can do to confront the Israeli aggression,” Mansour told the daily.

French Foreign Minister Laurent Fabius said on Sunday a ceasefire between Israel and Gaza militants was an urgent necessity and France was willing to help broker a truce.

"War is not an option, it is never an option," he told journalists in Tel Aviv. "There are two key words: urgency and ceasefire," he said.

Palestinian President Mahmoud Abbas called on Sunday for Palestinians to stage peaceful demonstrations against Israel's military offensive on Gaza militant groups.

"I call on the Palestinian people to intensify their peaceful demonstrations in the streets against the Israeli aggression in Gaza," he said at a meeting with the Palestinian leadership.

Khalil al-Dallu screams. "They said Mohammed was alive!" he shouts as emergency workers pull the body of a young man from a Gaza City home leveled by an Israeli strike on Sunday.

His face quickly crumples into tears as the emergency staff tell him that his cousin is in fact dead -- one of six members of the Dallu family killed when an Israeli missile struck the Nasser neighborhood, flattening the three-story building where they lived.

An Israeli official landed in Cairo on Sunday for Egypt-mediated truce talks with Hamas to end the Gaza conflict, Egyptian security officials said.

The official landed in a small plane at 1100 GMT and was quickly escorted away by intelligence personnel, the security officials said.