US President Barack Obama has condemned the killing of US aid worker Abdul-Rahman Kassig as “an act of pure evil”.
The IS militant group released a video showing a masked man standing over a severed head, which the White House confirmed was Kassig.
Kassig, 26, was taken while working for a refugee group. He is the fifth Western hostage to be killed by IS, which controls parts of Syria and Iraq, the BBC reported.
The president praised Kassig as a humanitarian and said he was “taken from us in an act of pure evil by a terrorist group that the world rightly associates with inhumanity”.
The other Western hostages killed by IS were Britons Alan Henning and David Haines, and US journalists James Foley and Steven Sotloff.
Those killings were carried out by a man believed to be British. That man bears a resemblance to one of the masked militants pictured in the video showing Kassig.
Unlike previous videos released by IS, the latest one shows the faces of many of the militants and specifies its location - Dabiq in Syria’s Aleppo province.
It also shows the beheading of 18 Syrian captives, who are identified as army officers and pilots.
