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Obama: Russia strikes 'strengthen IS' Syrian crisis: Russia air strikes 'strengthen IS'
(34 minutes later)
Russian air strikes in support of Syrian President Assad are strengthening Islamic State, US President Obama says US President Barack Obama has said the Russian bombing campaign in Syria in support of President Bashar al-Assad is driving moderate opposition underground and "only strengthening" Islamic State.
This breaking news story is being updated and more details will be published shortly. Please refresh the page for the fullest version. Mr Obama said he rejected the Russian assertion that all armed opponents of the "brutal" Mr Assad were terrorists.
If you want to receive Breaking News alerts via email, or on a smartphone or tablet via the BBC News App then details on how to do so are available on this help page. You can also follow @BBCBreaking on Twitter to get the latest alerts. Moscow insists its air strikes - now in their third day - are targeting IS.
But the Syrian opposition and others have suggested non-IS rebels are bearing the brunt of Russian attacks.
"The problem here is Assad and the brutality that he's inflicted on the Syrian people, and it has to stop," Mr Obama said at a White House news conference.
"We're not going to co-operate with a Russian campaign to destroy anyone who is disgusted and fed up with Assad."
He added: "From their [Russia's] perspective, they're all terrorists. And that's a recipe for disaster."
And he warned Russian President Vladimir Putin that Russia - and another Assad ally, Iran - faced dangers ahead.
"A military solution alone, an attempt by Russia and Iran to prop up Assad and try to pacify the population is just going to get them stuck in a quagmire. It won't work. They will be there for a while if they don't take a different course."
Russian air strikes - in depth
Where key countries stand - Who is backing whom
Why? What? How? - Five things you need to know about Russia's involvement
What can Russia's air force do? - The US-led coalition has failed to destroy IS. Can Russia do any better?
Media offensive - What does the campaign look like through the lens of Russian media?
Inside an air strike - Activist describes "frightening Russian air strike"
Syria's civil war
Why is there a war in Syria?
Anti-government protests developed into a civil war that four years on has ground to a stalemate, with the Assad government, Islamic State, an array of Syrian rebels and Kurdish fighters all holding territory.
Who is fighting whom?
Government forces concentrated in Damascus and the centre and west of Syria are fighting the jihadists of Islamic State and Jabhat al-Nusra, as well as less numerous so-called "moderate" rebel groups, who are strongest in the north and east. These groups are also battling each other.
What's the human cost?
More than 250,000 Syrians have been killed and a million injured. Some 11 million others have been forced from their homes, of whom four million have fled abroad - including growing numbers who are making the dangerous journey to Europe.
How has the world reacted?
Iran, Russia and Lebanon's Hezbollah movement are propping up the Alawite-led Assad government, while Turkey, Saudi Arabia and Qatar back the more moderate Sunni-dominated opposition, along with the US, UK and France. Hezbollah and Iran are believed to have troops and officers on the ground, while a Western-led coalition and Russia are carrying out air strikes.
The battle for Syria and Iraq in maps
Syria's civil war explained