United States
US says it always urges Israel to avoid civilian casualties
One more question and answer from the news briefing that the US Department of Defense has been holding at the Pentagon near Washington DC.
A senior official said the top priority of the US is to "contain the conflict and support the defence of Israel".
She said the US government is monitoring groups across the Middle East for anyone who "would consider joining or piling onto this conflict in a way that escalates it".
She then asnwered the BBC's Barbara Plett-Usher's question: "We all know that a lot of Palestinians will die... where will the US draw the line?"
"We are always urging our Israeli partners - all our partners - to avoid civilian casualties. I would note here that's absolutely something that Hamas did not do."
Biden confirms 11 Americans killed
US President Joe Biden has confirmed at least 11 Americans have been killed in the Israel-Hamas conflict.
"Sadly, we now know that at least 11 American citizens were among those killed — many of whom made a second home in Israel," he said in a written statement from the White House.
US has 'no comment' on alleged Hamas meeting
A senior US defence official says they would "not comment on intelligence matters today" after a question from Fox News reporter Jennifer Griffin about an alleged meeting between Hamas and Lebanese Islamist group Hezbollah that was reportedly brokered by Iran.
A report in the Wall Street Journal newspaper says that Iran played a key role in helping Hamas prepare for its surprise attack.
The newspaper said talks in Beirut began in August and included members of the Islamic Revolutionary Guard Corp.
The US has not specified what role Iran may have had. "Iran is in the picture here," the unnamed official said.
"We've been clear for years in Iran's role in fomenting instability across the region," the official added.
Pentagon confident it can provide support to Israel and Ukraine
The US defense department would not go into specifics about the type of weaponry and defence support it is sending Israel.
But a senior defense official said on background on Monday they are "working to assess what munitions are in the US inventory that can be made quickly available to Israel".
She said that aircraft had already taken off with munitions and added that the Pentagon is in constant contact with counterparts in Israel.
When asked if the US is worried they have used up ammunition supporting Ukraine, the official said they are able to support the armed forces there as well as Israel.
US warns those looking to bring instability to the region
The US Defense Department is sending a firm message that it is "supporting Israel's defence" in this conflict.
A senior official said on background that adversaries looking to take advantage of instability in the region should "think twice" before stepping in.
The warships the US has deployed to the eastern Mediterranean - the USS Gerald R Ford strike group - are there to conduct a "full spectrum" of maritime operations, the official said.
Part of their mission is to "minimize risk to widespread conflict".
It comes amid concerns that Iran or other regional groups opposed to Israel such as Hezbollah in Lebanon may join in the conflict.
US calls Hamas attack 'Isis-level savagery'
The US Department of Defense has been holding a news conference on the Israel-Hamas conflict.
A senior defence official said: "I want to differentiate this from other times we have seen between Israel and Hamas", calling it "Isis-level savagery" - referring to the actions of the so-called Islamic State group of militants.
The official said it was an “unprecedented attack on Israel” with houses burned to the ground and young people massacred at a music festival.