The ISIS militant who appears in the terror group's newest propaganda video could be the notorious British executioner known as “Jihadi John”.
The masked extremist in the new video stands over a Croatian hostage, who they have threatened to kill if Egypt does not release 'Muslim women' held in its prisons within 48 hours.
Jihadi John has not appeared in one of ISIS's propaganda videos since he was outed as Mohammed Emwazi from west London in February.
"The ISIS fighter in the video does not speak but does bear some similarities to the man once described as Islamic State's chief executioner."
He holds a sharp blade in his left hand, just as Emwazi did before he beheaded American journalist Steven Sotloff, his countryman Peter Kassig and British aid workers David Haines and Alan Henning and many other.
In The video the captive identifies himself as Tomislav Salopek from Croatia and says ISIS fighters captured him on July 22.
Mr Salopek, 31, continues: 'They want to substitute me with the Muslim womens arrested in Egyptian prisons.
'This matter have to be achieved before 48 hours from now, if not the soldiers of Wilyat Sina will kill me.'
Wilyat Sina is the Arabic phrase for the Egyptian group calling itself the Sinai Province of the “Islamic State”.
It was not clear where the video, entitled A Message to the Egyptian Government, was shot. Nor was it exactly clear who the militants wanted released.