"Authorities are also working to determine the authenticity of a video posted on social media that allegedly shows the murder of one of the tourists, according to the prosecutor."
Also see BBC News, Morocco murders: Tourist killings suspects 'backed IS', 20 Dec 2018
"Louisa Vesterager Jespersen, 24, from Denmark, and Maren Ueland, 28, from Norway, were found dead from knife wounds near a popular tourist spot."