President Trump says Iran appears to be standing down after it launched more than 20 missiles at Iraqi bases where US troops are stationed. He urged countries - including the UK - to send a "clear and united message" to Iran that its "campaign of terror" will no longer be tolerated.
The ballistic missiles were launched from the western Kermanshah Province in response to the assassination of General Qasem Soleimani by the US.
Al-Asad airbase in Iraq’s Anbar province was hit 17 times, including two missiles that failed to detonate. According to the Iraqi government, a further five missiles were targeted at a base in Irbil. Both the UK and American governments have said none of their citizens were killed or injured.
In his address this afternoon Donald Trump said the US would impose additional sanctions on Iran.
Meanwhile, just hours after the Iranian missile attacks a Ukrainian passenger plane, carrying 176 people - including 3 Britons, crashed shortly after take-off in Iran. There were no survivors.
The majority of passengers on the Boeing airliner were from Iran and Canada. Several airlines have now said they will avoid Iranian airspace.
Coverage presented by Sophie Raworth with reports by Jeremy Bowen, Nick Bryant, Laura Kuenssberg and Tom Burridge