The news of air strikes in Syria came in too late for most of the papers as many of the first editions focused on heightening tensions between UK and Russia.
However, a later edition of the Daily Mail reports that four UK jets took off at midnight, to join France and the US in launching air strikes against Bashar Al-Assad's regime.
In its later edition, the Sun's front page was re-worked to respond to the US-led air strikes in Syria. "Missiles blitz Assad" is the updated headline, in what the paper describes as "revenge for gas attacks". On its website, the Sun gives details of some of the targets for the missiles. It says these included sites where chemical weapons were made in the north east of the country, and near the capital, Damascus.
Like many news websites, the Daily Mirror has videos of the statements made early this morning, by Theresa May and US President Trump. It reports that several airlines have re-routed flights in the western Mediterranean after the European air traffic control agency warned of possible missile strikes near the conflict zone.
Huffpost UK summed up the situation up in just two words: "Bombing begins". It reports that the Syrian army's elite Republican Guard and Fourth Division were struck in the attack - and that at least six loud explosions were heard in Damascus.
The headline on the Times website is "British jets join attack on Syria, to punish Assad". There's a picture of buildings on fire in Damascus and anti-aircraft fire streaking across the night sky above the city.
Daily Mail Online has transcriptions of the full statements given by both Theresa May and President Trump. It highlights one particular line of Mrs May's address - that she authorised the action because she judged it to be "in Britain's national interest". The Mail quotes a witness in Syria suggesting that the Barzah district of Damascus - where a major Syrian scientific research centre is based - is one of the places that's been hit.