There has been "no increase in off-site radiation levels" at Iran's nuclear sites following US strikes, a watchdog has said.
The International Atomic Energy Agency said it would be providing further information when it became available.
The US has carried out attacks on three nuclear sites in Iran, in what Donald Trump called a "spectacular military success". Iran's foreign minister says it is considering "all options" for its response. Watch and follow the latest from Sky News below.
Sunday 22 June 2025 06:08, UK
There has been "no increase in off-site radiation levels" at Iran's nuclear sites following US strikes, a watchdog has said.
The International Atomic Energy Agency said it would be providing further information when it became available.
A Houthi official says the group's response to the US attacks on Iran is "only a matter of time", according to Al Jazeera Mubasher TV.
It comes shortly after the group, an Iranian proxy based in Yemen, published a statement condemning America's "blatant aggression".
"The American aggression against Iran represents a dangerous escalation," the Yemeni group said in a statement.
The Houthis are backed by Iran and allied with other Islamist groups in the region, such as Hamas and Hezbollah.
In the past, it has also accused Saudi Arabia of "colluding" with the US.
The Israeli military has said Iran has launched retaliatory strikes on Israel this morning.
It said its defensive systems are "operating to intercept the threat".
Our Middle East correspondent Alistair Bunkall, who is in Jerusalem, watched as the first missiles travelled overhead.
"These are the first missiles in almost 30 hours," so it has been an unexpected period of calm compared to the last eight or nine days," Bunkall says.
"But following the attacks by the US overnight, this is the first response from Iran, I think I have seen three over our heads."
Sirens then sounded as Bunkall spoke, and a red alert was sent to his mobile phone.
Members of the public have been instructed to "enter a protected space" and remain there until further notice, the IDF said.
It did not specify where in Israel missiles had been detected.
We have just had the first statement from the Iranian government regarding the US strikes that occurred overnight.
Iran's foreign minister, Seyed Abbas Araghchi, called the "outrageous" attack "extremely dangerous, lawless and criminal behaviour".
He added that every member of the United Nations should be "alarmed" by the "grave violation of the UN charter".
Here's Araghchi's post on X in full:
The United States, a permanent member of the United Nations Security Council, has committed a grave violation of the UN Charter, international law and the NPT by attacking Iran's peaceful nuclear installations.
The events this morning are outrageous and will have everlasting consequences. Each and every member of the UN must be alarmed over this extremely dangerous, lawless and criminal behavior.
In accordance with the UN Charter and its provisions allowing a legitimate response in self-defense, Iran reserves all options to defend its sovereignty, interest, and people.
It's just gone 5am here in the UK, and midnight in the US.
A lot has happened in the last few hours, so if you are just joining us, here is what you need to know.
Iran has said there were "no signs of contamination" at its nuclear sites in Isfahan, Fordow and Natanz after US airstrikes targeted the facilities.
The country鈥檚 National Nuclear Safety System Centre was quoted by Iranian state media as saying its radiation detectors had recorded no radioactive release.
"There is no danger to the residents living around the aforementioned sites," the statement added.
Fordow 'not seriously damaged'
An Iranian politician has been quoted as saying that the Fordow nuclear facility, which is buried deep underground, has not been seriously damaged, by Iran's Fars news agency.
It cited the same politician as saying what was damaged was "on the ground" and that it "could be restored".
To read more on Fordow and why the nuclear facility was so well protected, read the below explainer by our foreign news reporter Michael Drummond.
Donald Trump has said any retaliation by Iran after the US attacks will be met with "force far greater than what was witnessed tonight".
In a post on Truth Social, the US president wrote the stark warning in all capital letters, followed by "thank you".
Iran previously pledged to retaliate if the US joined Israel's assault, but there has not been any official statement from Tehran's leaders since the US launched its attack.
By Stuart Ramsay, chief correspondent
Iraq finds itself in a unique position. It's walking a tightrope, attempting to maintain good relations with both Iran and the United States at the same time.
Iraq's mostly Shia Muslim government is religiously aligned with Iran, but the country is reliant on America for helping maintain stability and security.
American military bases and military personnel stationed in Iraq are now targets.
After the US launched its strikes inside Iran, Iranian state TV declared every American citizen or soldier in the region a "legitimate target".
The Iraqi security forces include Shia militia groups, some of whom have already warned that they too would attack American bases and personnel in the country.
The government here may find it difficult to control these groups, whatever they may say publicly.
Iraq has condemned Israel for using their airspace to launch attacks on Iran, although in reality there is nothing they can do to stop it.
Remember, Iraq borders Iran, so their geographic proximity is important.
In his address to the nation, President Trump reminded the American people that US military personnel had lost life and limb in roadside bomb attacks from technology exported from Iran into Iraq after the Gulf War in 2003.
The whole region is now on tenterhooks waiting to see what happens next, and Iraq is right in the centre of it.
Iran's Atomic Energy Organisation has called the attack on three of the country's nuclear sites a "blatant violation of international law".
In a statement shortly after the US strike, the organisation - which is responsible for operating nuclear energy in the country - said the strike had happened under the "complicity" of the International Atomic Energy Agency.
"This organisation has placed on its agenda all necessary actions to defend the rights of the noble Iranian people, including legal follow-ups," the statement said.
It added it would not allow the development of Iran's "national industry" - an apparent reference to the country's nuclear development - to be stopped.
The White House has just released images from inside the Situation Room as Donald Trump held a National Security meeting on Saturday.
The images show the president, Vice President JD Vance, US Secretary of State Marco Rubio and other US officials watch on as strikes were carried out on three of Iran's nuclear facilities.