9, seven young Palestinians are killed by Israeli fire during clashes at the Gaza border.
At least 15 Palestinians were killed on Friday: two of them by Israeli tank fire, according to the Gaza Health Ministry.
Tens of thousands of Gazans have converged on the Strip's roughly 45-kilometer long (28-mile) eastern border with Israel to demand their right to return to their ancestral homes in historical Palestine. Three other protesters were shot dead, while a farmer died when he was hit by a tank shell, the health ministry said. Egypt, battling an Islamist insurgency in neighbouring Sinai, keeps its border with Gaza largely closed.
The goal of the demonstration, named "The March of Return", is to gain permission for Palestinian refugees to areas that their families had been displaced from when Israel was created in 1948.
The Israeli army is seeking to stem international condemnation by characterizing the protests as "riots" and "terror".
However, such plans appeared to be linked to a deal on Abbas taking charge in Gaza, and Israel didn't say what it would do if such an arrangement didn't work out.
The protests were organized by Gaza's Islamic militant Hamas rulers.
Snipers, army battalions and the aforementioned drones and tear gas have all been readied, and a practice attack using the drones was conducted by the Israeli Border Police on March 9 at Shujeiyeh - an attack which was both indiscriminate in its effect, and conducted well inside the Gaza border in a blatant breach of Palestinian sovereignty.
Israeli forces regularly use tear gas to disperse Palestinian protesters, whether thrown by soldiers or fired from specially equipped vehicles.
Britain and the United States expressed regret that the timing of the meeting - the first night of Passover - meant Israeli officials could not attend.
Israeli officials had braced for the effort to turn violent, while Palestinian supporters of the march said they hoped to capitalize on those optics.
Brig. Gen. Ronen Manelis, the chief spokesman of the Israeli military, described Hamas as "an organization in crisis" and accused its commanders of hiding behind women and children. "We will continue to stage sit-in strikes and demonstrations". It did not provide a breakdown. Nearly 2 million Gazans are virtually imprisoned in the 140-square-mile strip, under blockade since 2007, after Hamas assumed political control of the area.
The military said they opened fire at the "main instigators".
The US will move its embassy from Tel Aviv to Jerusalem around May 14, the 70th anniversary of Israel's declaration of independence.
The protests began as Palestinians marked Land Day, commemorating the killing of six unarmed Arab protesters in Israel in 1976.
Hamas spokesperson Fawzi Barhoum said that Friday's events showed that Israel's attempts to "change the reality" have failed. Some 30,000 protesters took part, according to the IDF.
The Party for Socialism and Liberation joins with all justice-minded people worldwide in solidarity with the oppressed people of Palestine.
Members of Hamas' top leadership milled about among the demonstrators, encouraging the protests and, at least implicitly, flaunting the rally's success to the Palestinian Authority, the internationally recognized governing body based in the West Bank city of Ramallah.
Prior to Friday's protest, organizers said the march would be nonviolent, but warned of possible military fire from Israeli forces.