Obama: Chemical weapon attack 'threat to global peace'

US President Barack Obama said the alleged use of chemical weapons by Bashar al-Assad's regime is "not just a Syrian tragedy, it's a threat to global peace and security."

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G20: 'UN paralysed over Syria'

World leaders have failed to reach agreement on the Syria crisis despite days of talks at the G20 summit in Russia. In a joint statement, 11 country's leaders - but not Vladimir Putin - admitted the UN Security Council "remains paralysed over Syria."