Battle for Raqqa: US-backed forces enter IS 'capital'
Monitor says the advance came after heavy air strikes by the US-led coalition killed 21 civilians trying to flee

Members of the Syrian Democratic Forces (SDF) in Hazima on the outskirts of the Raqqa on 6 June 2017 (AFP)
Published date: 6 June 2017 20:45 BST
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Last update: 7 years 10 months ago