Coalition strike 'kills 20 civilians' near IS-held Raqa

US-backed forces pressed offensives Wednesday on the Islamic State group's strongholds in Syria and Iraq, as an air strike by the American-led coalition reportedly killed 20 civilians near the Syrian city of Raqa. Supported by coalition air raids, Iraqi forces have pushed into IS's Mosul stronghold and a Kurdish-Arab militia alliance has been advancing on the jihadists' de facto Syrian capital Raqa. The Syrian Observatory for Human Rights said a coalition strike overnight had hit the IS-held vil