Israeli warplanes overflew Beirut, the eastern town of Baalbek that borders Syria, and southern Lebanon at low altitude Sunday, prompting a call for a complaint with the United Nations.

President Michel Suleiman tasked Caretaker Foreign Minister Adnan Mansour with filing an urgent complaint with the U.N. over the overflights “which covered all Lebanese regions, including the capital Beirut,” said a terse statement.

The remains of dozens of Palestinians killed by Israelis in fighting following the 1948 foundation of the Israeli state have been found in a mass grave in Tel Aviv's Jaffa district.

An official at the Muslim cemetery there told Agence France Presse that the grisly find occurred on Wednesday when ground subsided as workers carried out renovations, revealing six chambers full of skeletons.

Anti-Christian graffiti was daubed on the Church of the Dormition, one of Jerusalem's leading pilgrimage sites, early on Friday, an Agence France Presse correspondent reported.

Police said they suspected Jewish religious extremists of spraying the Hebrew-language insults at the site, where tradition says the Virgin Mary died.

The European Union on Friday condemned Israel's reported plans to build more than 1,000 new settler homes in east Jerusalem as a threat to the peace process.

EU foreign affairs head Catherine Ashton said she felt "compelled to reiterate the EU's long-standing position" following reports of the settlement plans.

British Ambassador to Lebanon Tom Fletcher expressed concern on Friday over the involvement of Lebanese fighters in battles in Syria, voicing the international community's hope that Lebanon would have carried out elections on time.

"It is of great sadness that Iran is now sending sons of Lebanon to die for (Syrian President Bashar) Assad," Fletcher said after talks with Caretaker Prime Minister Najib Miqati at the Grand Serail.

Arab League Deputy Secretary General Ahmed bin Hilli described on Friday Hizbullah's involvement in battles in Syria as “dangerous development,” calling on the party to reconsider its stance.

“Hizbullah's involvement in Syria battles complicates the matters,” Hilli said in comments published in As Safir newspaper.

Lebanon should stay out of the Syria conflict and Hizbullah's involvement is "not helping matters", Prime Minister-designate Tamman Salam told French daily Le Figaro in an interview published Friday.

Hizbullah has sent its fighters to help Syrian President Bashar Assad troops recapture the key town of Qusayr near the border with Lebanon.

The Palestinian foreign ministry on Thursday slammed Israel for having called off a United Nations investigative mission to Jerusalem's Old City, calling it an act of "contempt of international law and institutions."

The ministry said it "condemns in the strongest possible terms the decision of Israel, the occupying power, to prevent the technical mission of UNESCO from carrying its monitoring mission in the Old City of Jerusalem and its Walls."

Israeli President Shimon Peres has raised the possibility of an interfaith conference on peace during a recent encounter with Pope Francis in Rome, the presidency said on Thursday.

"The issue of a multi-faith conference was raised, and President Peres expressed his belief that Pope Francis can play an important role in progressing peace," the office of Peres informed Agence France Presse in a statement.

The United States warned Israel Thursday that continued settlement activity in east Jerusalem was "counterproductive" to efforts to reach a peace deal with the Palestinians.

Reacting to reports Israel is planning more than 1,000 new settler homes in east Jerusalem, State Department spokeswoman Jen Psaki called on both sides to take action to build confidence needed to build a lasting peace.