In a jarring contrast, Israeli forces shot and killed at least 55 Palestinians and wounded more than 1200 during mass protests Monday along the Gaza border, while just a few kilometres away Israel and the US held a festive inauguration ceremony for the new American Embassy in contested Jerusalem.
It was by far the deadliest day of cross-border violence since a devastating 2014 war between Israel and Gaza's Hamas rulers, and further dimmed the already bleak prospects for President Donald Trump's hoped-for peace plan.
Throughout the day, Gaza protesters set tires ablaze, sending thick plumes of black smoke into the air, and hurled firebombs and stones toward Israeli troops across the border.
The Israeli military, which has come under international criticism for using excessive force against unarmed protesters, said Hamas tried to carry out bombing and shooting attacks under the cover of the protests and released video of protesters ripping away parts of the barbed-wire border fence.
Monday's protests culminated more than a month of weekly demonstrations aimed at breaking a crippling Israeli-Egyptian border blockade. But the US Embassy move, bitterly opposed by the Palestinians, added further fuel.
There was barely any mention of the Gaza violence at Monday's lavish inauguration ceremony for the new embassy, an upgraded consular building located just 80km away.
Israeli Prime Minister Benjamin Netanyahu and other top officials joined an American delegation of Trump administration officials and Republican and evangelical Christian supporters.
The Palestinians, who seek east Jerusalem as their capital, have cut off ties with the Trump administration and say the US is unfit to serve as a mediator. Israel captured east Jerusalem in the 1967 Mideast war and annexed the area in a move that is not internationally recognised.
Palestinian President Mahmoud Abbas, furious over the embassy ceremony, said he "will not accept" any peace deal proposed by the Trump administration.
By nightfall, at least 55 Palestinians, including a young girl and four other minors, were killed, the Gaza Health Ministry said. It said 1204 Palestinians were wounded by gunfire, including 116 who were in serious or critical condition.
Israel says the blockade of Gaza, imposed by Israel and Egypt after Hamas overran the territory in 2007, is needed to prevent Hamas from building up its military capabilities.
But it has decimated Gaza's economy, sending unemployment skyrocketing to over 40 per cent and leaving the territory with just a few hours of electricity a day.
The Israeli military estimated a turnout of about 40,000 at Monday's protest, saying it fell short of what Hamas had hoped for. But officials described what they called "unprecedented violence" unseen in previous weeks.
Monday marked the biggest showdown in years between Israel's military and Gaza's Hamas rulers along the volatile border. The sides have largely observed a cease-fire since the 2014 war - their third in a decade.