A boy walks past a sign which reads 'Islamic State in Iraq and Syria' as fighting continues between the Syrian Democratic Forces and Islamic State militants in Raqqa

A boy walks past a sign which reads ‘Islamic State in Iraq and Syria’ as fighting continues between the Syrian Democratic Forces and Islamic State militants in Raqqa

A boy walks past a sign that reads 'Islamic State in Iraq and Syria' in Raqqa, Syria, August 20, 2017. Photo: Reuters / Zohra Bensemra

August 23, 2017 1:11 PM (UTC+8)