The Foreign Office is investigating reports that two Britons have died fighting in Syria.
The pair are believed to have been fighting for the Islamic State in Iraq and the Levant (ISIS), an Islamist group linked to al-Qaeda.
A Foreign Office spokesman said: "We are aware of reports and are looking into them."
More top news
Real Madrid have clinched a record 11th Champions League title after a dramatic penalty shoot-out victory over Atletico Madrid
Magician Richard Jones has won Britain's Got Talent 2016 after wowing the public with his amazing magic acts.
A medical tribunal found Dr Mark Bonar posed a "potential future risk of harm to patients".