UK officials believe a British man may have carried out a suicide bombing in the Syrian city of Aleppo last week.
If confirmed, this would be the first known attack of its type by a Briton in Syria.
The al-Qaeda-linked rebel group in Syria, al-Nusra Front, named the man as Abu Suleiman al-Britani. He is thought to be from Sussex.
Hundreds of British nationals are reported to have gone to Syria to fight against government forces.
One in 10 foreign militants is believed to be from Europe, while most of the others are thought to have come from Saudi Arabia, Tunisia and Libya.
http://www.bbc.co.uk/news/world-middle-east-26139884