Two British Islamic State (IS) militants known for their role in the torture and killings of Western hostages have been captured by Syrian Kurdish fighters, US officials say.
The men were part of a group of four militants known as "The Beatles" for their English accents and were the last ones to remain at large.
The two, whose capture was first reported by the New York Times, were identified as Alexanda Kotey and El Shafee Elsheikh.
The US State Department sanctioned Kotey in January 2017, saying he was a guard for the "Beatles" and "likely engaged in the group's executions and exceptionally cruel torture methods, including electronic shock and waterboarding".
Kotey had also acted as a recruiter and was responsible for recruiting several British nationals to join the militant group, the State Department says.
In March 2017, the State Department sanctioned Elsheikh, saying he was "said to have earned a reputation for waterboarding, mock executions and crucifixions while serving as an ISIS jailer".
The most notorious of the four was Mohammed Emwazi, known as "Jihadi John", an executioner of hostages made famous by Islamic State videos of beheadings.
A US-British missile strike believed to have killed Emwazi, a British citizen of Arab origin, was months in preparation but came together at lightning speed in 2015 in the Syrian town of Raqqa, according to US officials.