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The suspected chemical attack on a rebel-held town in Syria leads many papers - with pictures of injured children being treated on the front pages. The Times focuses on Donald Trump's warning to Syrian President Bashar al-Assad and his allies Russia and Iran of a "big price to pay".
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The Daily Express carries the headline "Sick" - a reference to Donald Trump's description of the attack in a tweet. It also highlights the accounts of "desperate" paramedics who treated people in the town of Douma.
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The US presidents's comments also are the focus for Metro, which notes he threatened retribution as footage from the scene emerged. Medical sources say dozens of people were killed but both Syria and Russia deny a chemical attack took place.
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The Daily Telegraph focuses on Donald Trump's warning to Russia's President Putin over its support for Syrian President Assad. It was his harshest criticism of the Russian leader since taking office, says the paper.
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The Daily Mirror reports that while the Donald Trump criticised Moscow, officials in Russia say President Putin would probably retaliate if the US acted against it.
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The Financial Times notes the US criticism comes as relations between Washington and Moscow are fraught following its imposition of sanctions against prominent Russians. The FT also finds room to carry a photograph of the musical Hamilton, following its Olivier Awards success.
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The Sun highlights Boris Johnson's "fury" over the Syria attack. Its lead story says singer Olly Murs has hit back at people who mocked him for tweeting about the panic inside a London department store during a terror attack scare.
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The Daily Mail says ministers are being urged to rethink funding cuts said to be crippling the Open University. Tory peer Lord Willetts, the former universities minister, is among those to suggest some level of public funding should return for mature students, it reports.
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The Guardian reports leaked Home Office documents cast doubts on claims by the home secretary that cuts to police were not to blame for rising violence. It says research suggests cuts "may have encouraged" violent offenders and be a contributory factor in the upsurge.
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The i leads on Home Secretary Amber Rudd's crackdown on youth crime. Ministers are to unveil a new strategy to tackle serious violence, including new laws on weapons.
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The Daily Star leads on Peter Kay's appearance during a charity screening in Blackpool - the first time the comedian has been on stage since cancelling all future work projects for family reasons.