Two British extremists believed to have been members of Islamic State's brutal executions group dubbed "The Beatles" have reportedly been captured.
A separate USA official, speaking on condition of anonymity, said the Syrian Democratic Forces (SDF) had captured the two in early January in eastern Syria.
An image grab taken from a video released by the Islamic State (IS) shows a masked militant holding a knife and gesturing as he speaks to the camera in a desert landscape before a beheading. They were involved in the torture and killing of Western hostages such as American journalists James Foley and Steven Sotloff, plus the British charity worker Alan Henning.
The US official did not give any information on the condition of the two or what would happen to them.
Along with Mohammed Emwazi - the killer nicknamed Jihadi John - and Aine Davis, they are believed to have been part of a group named after the 60s band due to their English accents.
The most notorious cell member, Mohammed Emwazi, nicknamed Jihadi John, was shown beheading several hostages in widely circulated videos between 2012 and 2014.More news: President Trump wants to hold parade in Washington to celebrate the military
Aine Davis, the fourth member, was detained in Turkey in 2015 and convicted on terror charges a year ago.
The fourth member of the group, Aine Davis, is a former drug dealer - also from west London. Both men have been designated foreign terrorists by the United States. Kotey, born in London, is of Ghanaian and Greek Cypriot background, while Elsheikh's family fled Sudan in the 1990s. They repeatedly beat the hostages they kept imprisoned in Raqqa, Syria, formerly the Islamic State's self-declared capital, and subjected them to waterboarding and mock executions, noted The New York Times.
The pair were captured by Syrian Democratic Forces who, suspecting their identities, allowed American Special Operations forces access to them.
The Telegraph a year ago reported that the two missing men were on a U.S. "kill list" reserved for senior Islamic State terrorists.
American authorities were informed last month that the militia might have apprehended Kotey and Elsheikh, according to the Times.