The infant son of Shamima Begum, a British teenager who left London to join the Islamic State group in Syria, has died.
A spokesman for the U.S.-backed Syrian Democratic Forces confirmed the news on Friday (March 8).
Begum was stripped of her British citizenship last month on security grounds after she was discovered in a detention camp in Syria.
The 19-year-old left London to join IS when she was 15.
Whilst in Syria her first two children also died.
Begum had sought to return to Europe with her third child, Jarrah, born about three weeks ago.
The British teen married a Dutch fighter for IS who surrendered to Syrian fighters and was being held in a Kurdish detention centre in northeastern Syria.
A British government spokesman said: "The death of any child is tragic.
The government will continue to do whatever we can to prevent people from being drawn into terrorism and travelling to dangerous conflict zones." The shadow Home Secretary said the infant's death was "a stain on the conscience of this government" and was "morally reprehensible".
The fate of Begum has illustrated the ethical, legal and security conundrum that governments face when dealing with the families of militants who swore to destroy the West.