Syrian Kurdish fighters have bagged the last two ISIS "Beatles", The New York Times reported Thursday.
Alexanda Kotey and El Shafee Elsheikh were the final two fighters of the four-man unit to remain at large until their detention by Kurdish forces, reports the BBC.
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.
The US government says the group beheaded more than 27 hostages.
The US official did not give any information on the condition of the two or what would happen to them.
Emwazi, who was killed in a USA air strike in 2015, appeared in a number of videos in which captives including British aid workers David Haines and Alan Henning were beheaded.
Alexanda Kotey was from Paddington. In January 2017 US authorities named Kotey as a member of the cell and said they had imposed sanctions on him
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.
Aine Davis, the fourth member of the group, dubbed "the Beatles", was captured by Turkish authorities in 2015 near Istanbul after fleeing IS territory. Like all three of his comrades, Emwazi had resided in West London. They subjected western hostages they guarded in Syria to constant beatings. It said the British militant was "said to have earned a reputation for waterboarding, mock executions, and crucifixions while serving as an [IS] jailer".
Meanwhile, Kotey, 34, who is half-Ghanaian and half-Cypriot, converted to Islam after falling in love with a Muslim woman and had two daughters with her.
It is unclear if the Justice Department will prosecute the two men or when they will be turned over to the US military, the Times reported.
Kotey was also responsible for recruiting several British nationals to join the jihadis, the State Department said.