There is much that is still not known about the US strikes against Iran’s nuclear facilities.
Reports are coming in about which sites were hit and what military elements were involved, as President Donald Trump hails the attack on social media.
Here’s what we know so far.
Follow latest: US bombers strike three Iranian nuclear sites
Which sites were hit?
America appears to have hit the three key locations in Iran’s nuclear programme.
They include Isfahan, the location of a significant research base, as well as uranium enrichment facilities at Natanz and Fordow.
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Natanz was believed to have been previously damaged in Israeli strikes after bombs disrupted power to the centrifuge hall, possibly destroying the machines indirectly.
However the facility at Fordow, which is buried around 80 metres below a mountain, had previously escaped major damage.
Details about the damage in the US strikes is not yet known, although Mr Trump said the three sites had been “obliterated”.
Read more:
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What weapons were used in the attacks?
The White House and Pentagon did not immediately elaborate on the operation, but a US official said B-2 heavy bombers were involved.
Fox News host Sean Hannity said he had spoken with the president and that six bunker buster bombs were used on the Fordow facility.
Bunker buster bombs are designed to explode twice. Once to breach the ground surface and again once the bomb has burrowed down to a certain depth.
Israel has some in its arsenal but does not have the much more powerful GBU-57, which can only be launched from the B-2 bomber and was believed to be the only bomb capable of breaching Fordow.
Hannity said 30 Tomahawk missiles fired by US submarines 400 miles away struck the Iranian nuclear sites of Natanz and Isfahan.
