GAZA CITY, Gaza Strip (AP) — Tens of thousands of Palestinians gathered Saturday at rallying points near the Israeli border to mark the first anniversary of weekly protests in the Gaza Strip, as Israeli troops fired tear gas and opened fire at small crowds of activists who approached the border fence. At least 10 protesters were wounded by live fire, according to Palestinian medical officials.

Gaza's Hamas rulers had pledged to keep the crowds a safe distance from the fence as Egyptian mediators tried to cement a cease-fire agreement. Dozens of volunteers in fluorescent vests were deployed to restrain demonstrators. Ambulances lined up in front of clinics and police supervised encampments erected far from the fence.

But as the crowds swelled throughout the afternoon in response to Hamas' calls for a large participation, dozens of protesters approached the fence, unfurling Palestinian flags and throwing rocks and explosives toward Israeli soldiers positioned nearby. The Israeli forces responded with tear gas and live fire to disperse the crowds.

Saturday's protest came at a sensitive time for both Israel and Hamas.

Israeli Prime Minister Benjamin Netanyahu is seeking his fourth consecutive term in April 9 elections, but is facing a serious challenge from a group of ex-army chiefs who have criticized what they say is his failed Gaza policy.

In the final stretch of the campaign, Netanyahu needs to keep the Israel-Gaza frontier quiet, without seeming to make concessions to Hamas. Netanyahu took heavy criticism this week for what was seen as a soft response to renewed rocket fire out of Gaza.

Hamas, meanwhile, faces growing unrest in Gaza as a result of worsening conditions after more than a decade of Israeli and Egyptian border closures.

The fence protests, which began exactly a year ago, have been aimed in large part at breaking the Israeli-Egyptian blockade on Gaza, but haven't delivered major improvements.

Fouad Aishan, 40, came with his five children to the frontier. He said he planned to show his children the Israeli soldiers and return to safety before the protest started.

"I come here driven by personal national motivation," he said. "It has nothing to do with what the politicians do."

The Israeli military estimated 30,000 Palestinians were gathered at the marches.

"The rioters are hurling rocks and setting tires on fire. In addition, a number of grenades and explosive devices have been hurled at the Gaza Strip security fence," it said in a statement. It said soldiers were responding with "riot dispersal means" and firing in line with standard procedures.

Earlier on Saturday, Gaza health officials said Israeli troops shot and killed a Palestinian man near the perimeter fence, hours before the mass rally.

Gaza's health ministry said Mohammed Saad, 21, was hit by shrapnel in the head.

The army said about 200 Palestinians "rioted during the night along the fence" and that the army used riot dispersal means against them.

A Gaza hospital worker, speaking on condition of anonymity because he was not authorized to brief the media, said Saad was a member of the so-called "night disturbance unit." Such groups routinely burn tires, flash laser lights and detonate explosives near the fence at night to distract soldiers and disturb residents of nearby Israeli communities.

The marches near the fence began a year ago, initially organized by grassroots activists who were calling for a mass return to their ancestors' homes in what is now Israel. Some two-thirds of Gaza's 2 million people are refugees or descendants of refugees who fled or were forced from their homes during the war surrounding Israel's establishment in 1948.

Hamas quickly took the lead in the protests, using the gatherings to call for an easing of the blockade.

The blockade, imposed after Hamas seized Gaza in 2007, has devastated Gaza's economy. Unemployment is over 50 percent, ground water has become undrinkable and electricity has turned into an intermittent luxury.

The border marches routinely ended in confrontations, with some of the Palestinian demonstrators burning tires, hurling fire bombs or setting off explosives and Israeli troops firing live rounds and tear gas.

According to a Gaza rights group and a count by The Associated Press, 196 Palestinians were killed in the demonstrations over the past year, including 41 minors, and thousands were wounded by live fire. An Israeli soldier was also killed in the context of the marches.

Egypt has repeatedly tried to broker a cease-fire between Israel and Hamas, stepping up efforts in recent days after a Gaza rocket struck a house in central Israel earlier this week, injuring seven Israelis and threatening renewed escalation.

Palestinians with knowledge of the talks have said that as part of the proposed deal, Gaza protesters were to keep away from the fence Saturday and Israeli troops were to hold their fire.

Under the Egyptian plan, Israel was to offer economic incentives for Gaza in exchange for calm, according to Palestinian officials.

Khalil al-Hayya, a senior Hamas official, said the group had received "positive signs" from the Egyptians. He added that the Egyptian team was to return to Israel on Sunday to continue the talks. "We will continue our marches until all our goals are achieved," he said.

Earlier this month, Hamas quelled what have been portrayed as the fiercest protests yet against its mismanagement and failure to improve the internal economic situation.

Hamas blames the blockade and punitive measures by its West Bank-based rival, the Palestinian Authority, for worsening the living conditions.

Associated Press writer Isabel DeBre contributed reporting from Jerusalem.