Hundreds of Greeks took part Tuesday in a protest by leftist parties against the conflict in Gaza, which has killed more than 620 Palestinians and 29 Israelis in 15 days.

"Hands off Gaza," around 2,000 protesters chanted as they marched past parliament and the European Union offices in Athens.

A senior Palestinian official said Tuesday talks were ongoing with Hamas for a truce to end its war in Gaza with Israel, adding both sides have refused a humanitarian ceasefire.

Azzam al-Ahmed, an aide to Palestinian president Mahmoud Abbas, landed again in Cairo on Tuesday where he could meet U.S. Secretary of State John Kerry, already in the Egyptian capital pushing for a truce.

The Palestinian envoy to the United Nations held up photographs of slain children and read out the names of the dead on Tuesday as he pleaded for action from the Security Council.

"On behalf of the Palestinian people, we ask: What is the international community doing to stop this bloodletting, to stop Israel's atrocities?" Riyad Mansour said at a debate on the Gaza crisis.

A rocket fired from Gaza hit north of Tel Aviv's Ben Gurion airport on Tuesday, police said, prompting U.S. and European airlines to suspend flights to and from Israel.

"A house was damaged in a rocket strike in the Kiryat Ono Yehud region, several kilometers (miles) from the airport," police spokeswoman Luba Samri told Agence France Presse.

The Palestinian Ministry of Health announced on Tuesday that at least 624 people have been killed and another 3750 since the start of the Israeli assault on the Gaza Strip.

In the latest attacks, Israeli strikes killed at least 13 women and children in Gaza, medics said, as the army announced the deaths of two more soldiers in the two-week conflict.

Al-Mustaqbal parliamentary bloc on Tuesday announced that it will organize a sit-in Wednesday to denounce the Israeli assault on Gaza which has killed more than 600 people until the moment, as it warned of “an attempt to blow up the situations in Tripoli.”

Condemning the Israeli “enemy's hostility, barbarism and brutal attacks, which were also committed in the past against Gaza, Lebanon and unarmed innocents in several Palestinian regions,” the bloc hailed “the endurance of the Palestinian people and the valor of the Palestinian resistance's heroic fighters.”

The lower house of Jordan's parliament Tuesday condemned Israel's "brutal and racist aggression" on Gaza, describing the death of more than 590 Palestinians as "the most atrocious mass killing operation."

"Palestinians in Gaza are facing the the atrocious mass killing operation by the brutal racist Israeli occupation, which is violating international laws," the 150-member lower house said in a statement.

TV channel Al-Jazeera evacuated its bureau in Gaza when it came under fire on Tuesday, the Qatar-based network said.

Two warning shots were fired at the 11-story Jalaa building in central Gaza City, housing local and international media as well as private apartments, an Agence France Presse correspondent reported.

U.N. chief Ban Ki-moon demanded Tuesday that Israel and Hamas halt spiraling violence in Gaza as he pushed diplomatic efforts to end bloodshed that has killed more than 620 Palestinians.

Following top-level truce talks in Cairo, the U.N. secretary-general headed to Israel to deliver his message in person as the 15-day conflict showed no sign of easing.

Prime Minister Recep Tayyip Erdogan has sacrificed any possibility of Turkey playing a mediation role in Gaza in favor of seeking to impress voters ahead of presidential polls with the toughest ever anti-Israeli rhetoric from a Turkish leader.

Before the rise to power of Erdogan's Islamic-rooted Justice and Development Party (AKP) over a decade ago, NATO member Turkey was Israel's key ally in the Islamic world, a policy enthusiastically cheered by the United States.