Hundreds of Palestinians are feared dead after a huge blast at a hospital in Gaza City, blamed by the Hamas group on an Israeli air strike
Israel says the blast was caused by rockets misfired by another group, Palestinian Islamic Jihad, and both sides deny blame
US President Joe Biden will visit Israel on Wednesday but a planned summit in Jordan with Arab leaders has been cancelled
At least 600,000 Palestinians have fled the northern Gaza Strip for the south since Israeli military warnings
Israel has blocked essential supplies to Gaza in retaliation for a Hamas attack on 7 October that left 1,300 Israelis dead
Whilst we're bring you key updates here on the situation on the ground in Israel and Gaza, our correspondents have been answering your questions on the war.
We've put together a page, dedicated to expert analysis of what our readers are asking.
Head over to there to get a breakdown of common queries, and to submit your own.
We'll be there until 18:00 BST (17:00 GMT).
Our US State Department correspondent, Barbara Plett Usher, says there's been a change in the plans of the US Secretary of State Antony Blinken, who's in Jerusalem to meet the Israeli prime minister.
Instead of going back to the United States tonight as planned, he's going to go back to the Jordanian capital, Amman.
Whenever a top diplomat like Antony Blinken changes his travel schedule, she says, it is perhaps a sign that they're working on something.
In the last hour, the armed wing of Palestinian militant group Hamas claimed it was responsible for firing a "barrage of missiles" on Tel Aviv and Jerusalem in Israel today.
In a statement, the Al Qassam Brigades said the latest attacks were in response to Israel's "targeting of civilians".
Our correspondent Yolande Knell said she had been in the shelter in Jerusalem after hearing the unexpected rocket siren.
She said: "Our crowded BBC office had to take shelter in the safe room as sirens went off."
James Landale
Diplomatic correspondent
Iran’s Foreign Minister, Hossein Amirabdollahian, has warned that the possibility of the war between Israel and Hamas spreading to other fronts “is approaching (the) unavoidable stage”.
In a statement posted on X, external, he said that “time is running out for political solutions” and accused Israel of “crimes and murder in Gaza”.
He wrote: “Conferred with my counterparts from Malaysia, Pakistan, Tunisia. Underlined the need to immediately stop Zionist crimes and murder in Gaza and to dispatch humanitarian aid.
"I stressed that time is running out for political solutions; probable spread of war in other fronts is approaching unavoidable stage.”
Speaking just before Blinken, Israel's defence minister Yoav Gallant told the US secretary of state that "this will be a long war, the price will be high, but we are going to win - for Israel, for the Jewish people, and for the values that both countries believe in".
He thanked the United States for its support, and referred to the US warships - including two aircraft carriers - deployed to the eastern Mediterranean since Hamas' attack on Israel.
We've just heard a few brief words from the US secretary of state, Antony Blinken, who is in Israel, having returned to the country after diplomatic visits across several other Middle Eastern nations.
He says that the US understands Israel's commitment, indeed its obligation, to defend itself and its people - and says Israel will "always have the support of the United States in that".
US secretary of state Antony Blinken, who is currently in Israel, has just started speaking.
He has been discussing with Israeli officials allowing aid supplies into Gaza amongst other things, after some shuttle diplomacy across the Middle East to try to prevent the conflict from spreading.
Stick with us for the latest lines.
Tom Bateman
Reporting from Jerusalem
In Gaza, thousands of Palestinians who hold foreign passports have massed close to the border with Egypt amid reports that the crossing could open to let people out and aid trucks in.
But a hoped-for humanitarian truce has failed to materialise, meaning Gaza’s catastrophe is deepening.
Water is running out and there are huge queues at bakeries where bread is rationed to five pieces per family. Hospitals are close to a complete collapse of services, threatening thousands of lives, says the UN.
Meanwhile, the Israeli military says it now knows the identities of 199 people - including children and the elderly - who were taken hostage by Hamas in Gaza. It says their families have been informed but there is growing anger and frustration among some at lack of any progress over their fate.
Secretary of State Antony Blinken is back in Jerusalem after a three-day round of diplomacy, trying to prevent the crisis engulfing the region.
Lucy Manning
BBC News Special Correspondent
UK PM Rishi Sunak has just said six British people were killed in the Hamas attacks on Israel. Nathanel Young, a British man serving in the Israeli army, was among those killed by Hamas gunmen on 7 October.
Today, in his first interview with news outlets, his brother Eliot said: “My brother just wanted to keep his people safe.”
At the funeral last Monday, air raid sirens interrupted the ceremony as mourners had to lie on the floor, shielding from any incoming Hamas rockets.
“It was terrifying - especially for my parents who had just arrived from London. It was very traumatic for them.
"What went through my head - even while I’m trying to say goodbye to my brother - was, 'they are trying to kill me'.”
He described his younger brother as someone who loved music; his nickname was DJ. “He just loved life," said Eliot.
"We are all devastated…The last time I saw him was exactly a week before he was killed by the Hamas terrorists. If I look back at that day I remember his infectious smile. We always gave each other a huge hug. I will miss that smile, that hug and those laughs we had together.”
Watch: British Israeli soldier's funeral interrupted by sirens
Former PM Theresa May calls the attack by Hamas barbaric.
“Terrorists must be defeated whoever they are, wherever they are,” she says and commends the prime minister and the foreign secretary for the government’s stance in support of the Jewish community and Israel's right to defend itself.
She asks the prime minister to commit to leaving no stone unturned in preventing an escalation of the conflict in the region.
The debate in the House of Commons continues and you can watch it by pressing Play at the top of the page.
Next we hear from the SNP's Westminster leader Stephen Flynn who quotes a passage from the famous poet Robbie Burns.
"History will judge us on our response to the humanitarian crisis which is unfolding in Gaza," Flynn says.
He finishes by saying Hamas "will not be on the right side of history".
Starmer notes devastating stories from across the UK and says he spoke with the First Minister of Scotland Humza Yousaf whose in-laws are trapped in Gaza with no prospect of safe passage to another country.
The Labour leader says there has been a "worrying rise" of islamophobia and antisemitic behaviour.
Starmer says we must not forget or underestimate the burden of history Jewish people carry with them.
He insists Westminster and Britain are "united".
"Our values cannot be compromised," he says and finishes: "Terror cannot win."
Leader of the opposition Sir Keir Starmer is up now.
He joins Sunak in condemning the "senseless murder of men, women, children, the horrors of hostage taking, music festivals turned to killing fields, an attack with no cause than bloodshed."
"As in any time of grave crisis it is crucial this House speaks with one voice of condemnation of terror and in support of Israel in its time of agony and for the dignity of all human life," Starmer says.
He says the goal of Hamas is not peace, but to see Israel "wiped off the map".
"But Hamas are not the Palestinian people and the Palestinian people are not Hamas."
Starmer says Israel has the right to defend itself, and the world must continue to strive to a two-state solution for a Palestinian state and a safe a secure Israel.
"We cannot give up on that hope," he says.
Image source, ParliamentThe Prime Minister insists the UK will do all it can to keep stability in the region and will aim to do so by "using all the tools of diplomacy".
Sunak says he met with the King of Jordan, King Abdullah, yesterday and has spoken with the leaders of Turkey and Egypt as he notes the UK's partners have asked to help prevent further escalation.
He finishes after condemning Hamas.
Sunak continues by asking how the UK should respond.
"We support Israel's right to defend itself and deter further incursions," he tells the House of Commons.
But, the PM insists this must be done in line with international humanitarian law.
"As a friend we will continue to call on Israel to take every possible precaution to avoid harming civilians," Sunak says.
Forces are being bolstered in Cyprus in the region and increasing a presence to prevent broader instability in the area.
Sunak tells the House he is increasing aid for Palestinian civilians by a third, with a £10m boost to existing funds.
Rishi Sunak now addresses the British Jewish community directly.
"We stand with you now and always," he says to a chorus of "hear hear".
"This atrocity was an existential strike at the very idea of Israel as a safe homeland."
Sunak says his government is "doing everything we can" to protect the community.
He adds that £3 million has been put to protecting Jewish community buildings and police will "ensure hate crimes and glorification of terror will be met with full force of the law".
He then turns to British Muslim communities "who are appalled by Hamas".
We must listen to their concerns with the same attentiveness, Sunak says.
"Let's say it plainly. We stand with British Muslim communities too," he says.
"Hear hear," the House echoes.
Rishi Sunak is on his feet at the dispatch box as he starts to address a busy House of Commons by condemning the attacks in Israel.
He says almost 200 people have been taken hostage as he notes elderly men, women, children and babies were "murdered, mutilated and burned alive".
Some of families of those missing are in the public gallery, Sunak adds.
He says: "We call for the immediate release of all hostages."
Sunak confirms at least six British people have been killed.
A further ten are missing, he adds.
Image source, ParliamentWe are briefly heading to the House of Commons in London where Prime Minister Rishi Sunak is addressing Parliament on the situation in Israel and Gaza.
Sunak will face questions after, so stay with us as we bring you his statement.
You can watch live at the top of this page.
Image source, ReutersAntony Blinken arrived in Tel Aviv on a flight from Jordan
US Secretary of State Antony Blinken has been discussing humanitarian aid to civilians in a meeting in Tel Aviv with the Israeli prime minister, as well as getting an update about the situation on the ground.
In a statement, the US State Department "underlined its firm support for Israel’s right to defend itself from Hamas’ terrorism and reaffirmed US determination to provide the Israeli government with what it needs to protect its citizens".
"The secretary also discussed our commitment to the safe and speedy release of those held hostage by Hamas."
Earlier today we covered reports that Rafah crossing on the Egypt-Gaza border might open for a few hours to let aid in and some people out of the territory.
Hamas, Egypt, and Israel all exercise control over who can pass through.
It came after US Secretary of State Antony Blinken said the Rafah crossing into Egypt "will reopen".
Israel and Hamas both denied that a truce was taking place today to allow the movement of aid and some foreign nationals.
However, we are now seeing a report that White House officials are still hoping it could open for a few hours later.
"We're hoping, hoping, that sometime later today, it can be open for a period of hours. But again, we just have to kind of wait and see how this goes," Reuters news agency says White House spokesperson John Kirby told CNN.
"We're going to keep working at this very, very hard."