Theresa May has urged an independent enquiry into violence on the border between Israel and Gaza which formerly larboard a reported 58 Palestinians dead.
The prime minister said the use of flaming rounds by Israeli forces was «deeply troubling» and urged greater taboo.
While Palestinians had a legitimate right to protest, she said, she was concerned back extremist infiltration and the role Hamas had played.
Earlier, Labour’s Emily Thornberry damned a «horrific massacre».
Funerals are being held for the people killed when Israeli troops mooted fire during Palestinian protests.
At a press conference in No 10 go along with talks with Turkish President Recep Tayyip Erdogan, Mrs May believed the events were «destructive» to attempts for a lasting peace, and an inquiry into what go oned was paramount.
While Israel had a right to defend its borders, she said «the use of red-hot fire and the resultant loss of life is deeply troubling… It is in everybody under the sun’s interest for peace to prevail in Israel and the Occupied Territories».
During an clamorous question in the House of Commons, several MPs asked about UK arms purchases to Israel and criticised the United States’ decision to move its embassy to Jerusalem, a turn opposed by the UK.
As well as calling for restraint from Israel, the UK government said quiet protests in Gaza were «exploited by extremists».
Monday’s protests were lingered to mark the anniversary of Israel’s creation in 1948 and the hundreds of thousands of Palestinians who afterwards fled their homes or were displaced in the war that followed.
- Palestinian Nakba extenuated in 100 and 300 words
Israel said some 40,000 Palestinians had captivated part in «violent riots» at 13 locations near Israel’s guarantee fence along Gaza’s eastern border.
But Ms Thornberry said Monday’s affairs were the result of «an apparently calculated and deliberate policy to kill and commission unarmed protesters, who posed no threat to the forces on the Gaza border.
«Multitudinous of them, shot in the back. Many of them, shot hundreds of metres from the adjoin, and many of them, children.»
Ms Thornberry told MPs action was needed «to stop this vicious liquidate».
In the Commons, Foreign Office Minister Alistair Burt said the savagery should be used as «an opportunity for a springboard to peace».
«We have no side here, except with the sufferers,» he said, calling for an investigation into why so much live ammunition was utilized.
He also asked why Ms Thornberry had not mentioned «any possible complicit involvement of Hamas», Gaza’s Islamist rulers, blamed by Israel for the passion.
- What is Hamas?
«There must be a political solution,» he added.
Veteran Rightist MP Sir Nicholas Soames urged the UK to have a «less limp» response.
The SNP’s Stephen Gethins communicated the US decision to move its embassy in Israel to Jerusalem was «reckless and irresponsible» and about a invited if ministers agreed it had «stoked tensions» there.
In response, Mr Burt told the move «was not supported by the UK», was «not conducive to peace in the region» and its timing was «extremely particular».
He also said the US should have «a greater sense of understanding of some of the underlying children» behind the Israeli-Palestinian conflict.
Liberal Democrat MP Layla Moran, who is of Palestinian descent, asserted the two sides were not meeting as equals and urged recognition of a Palestinian magnificence by the UK.
Mr Burt said the question of recognition «remains open» but needed to turn up «at a time when it’s most designed to serve the cause of peace».
What take placed at the Gaza border?
Palestinians were demonstrating on Monday as they maintain been for seven weeks, as part of a protest orchestrated in part by Hamas and labeled the «Great March of Return».
Palestinians hurled stones and incendiary charges and approached the border fence. Israeli snipers fired live ammunition at protesters and reach-me-down tear gas dispersed from drones.
- Monday’s events as they found
- What makes Jerusalem so holy?
Israeli President Benjamin Netanyahu aspired to justify the military action. «Every country has an obligation to defend its trims,» he said.
Hamas did not initiate the weekly protests that have been fetching place for the past seven weeks but the group has since become the pilot force. At the end of March, the Hamas leader in Gaza, Yahya Sinwar, conjectured the demonstrations were aimed at removing the «transient border» with Israel.
Hamas has elicited for Israel’s destruction and is in a permanent state of conflict with the Jewish constitution.
Why is the embassy so controversial?
The violence in Gaza and the US embassy opening were not explicitly linked but both were in days of yore to coincide with Israel’s 70th anniversary on Monday.
Commentators drew heed to the stark contrast between the images from Jerusalem — of a high-level US delegation, alongside Mr Netanyahu and his missus, celebrating the new US embassy opening — and the violent images emerging from Gaza.
The relocation breaks with decades of US principles and has incensed Palestinians and other nations, who say it violates international law.
Palestinians contend East Jerusalem as the capital of a future Palestinian state, and see the US move as funding Israeli control over the whole of the city.
The Palestinian president, Mahmoud Abbas, accompanied the new embassy «a US settlement in East Jerusalem».
What is the Gaza Strip?
The Gaza Bare is a narrow piece of land along the Mediterranean coast between Israel and Egypt, near 40km (25 miles) long and 10km wide. It is home to about 1.8 million Palestinians, establish f get oning it the third most densely populated place in the world.
The shape of the take off was defined by ceasefire lines with Egypt at the end of the 1948-49 Arab-Israeli war.
Egypt carry oned Gaza for the next 19 years but Israel occupied it in the 1967 Arab-Israel war. It retracted its forces and settlers in 2005 but the UN still considers the territory occupied because Israel keeps control over the territory’s air space, coastal waters and shared trimming.
Politically, Gaza is controlled by Hamas, which Israel and other powers relate to as a terrorist group. Since 2007, Israel and Egypt have on a sea and air blockade, controlling the flow of commercial goods and people in and out of the strip. They say it is for their own surveillance.
The Gaza Strip is impoverished and the UN has warned it is on the verge of total collapse.
In 2014, a 50-day war between Israel and militants in Gaza killed 2,251 Palestinians, counting 1,462 civilians. On the Israeli side, 67 soldiers and six civilians dissolved.