A former Royal Marine has become the first Briton to be killed while fighting against Islamic State in Syria, according to reports.
He has been named by the Kurdish People's Protection Units (YPG) as Konstandinos Erik Scurfield, from Barnsley, the BBC reported.
A Foreign Office spokesman said: "We are aware of reports of the death of a British national in Syria.
"The UK has advised for some time against all travel to Syria, where all UK consular services are suspended.
"As we do not have any representation in Syria, it is extremely difficult to get any confirmation of deaths or injuries and our options for supporting British nationals there are extremely limited."
A British pro-Kurdish activist told the BBC he had informed Mr Scurfield's family of the death, at the request of the YPG.