The news of Kotey and Elsheikh's capture was first reported by the New York Times, which said the two were detained by the US-backed Syrian Democratic Forces fighting the last pockets of IS militants in Syria along the Euphrates River south of the border with Iraq.
Syrian Kurdish fighters have captured two British "Islamic State" militants known for their role in the torture and killings of Western hostages, two U.S. officials said on Thursday. They were known as "The Beatles" due to their British accents.
Alexanda Kotey and El-Shafee el-Sheikh were captured and identified by the American-backed Syrian Democratic Forces (SDF), according to a USA defense official.
Citing unnamed United States officials, the Times reported the pair of men were captured by the American backed Kurdish militia the Syrian Democratic Forces, operating south of the Euphrates river, close to the Syria-Iraq border.
As a fellow member of the "the Beatles", the State Department wrote last January that "Kotey likely engaged in the group's executions and exceptionally cruel torture methods, including electronic shock and waterboarding".
Elsheikh, 29, was born in Sudan and fled with his family to the U.K.in the 1990s before ultimately leaving for Syria, while 34-year-old Kotey was born in London as a member of the Greek Orthodox faith before converting to Islam as a teenager.
Davis is imprisoned in Turkey on terrorism offences.
"The Beatles", the State Department said, "is responsible for holding captive and beheading approximately two dozen hostages, including several Westerners".