Louisa Vesterager Jespersen, 24, from Denmark, and Maren Ueland, 28, from Norway, were butchered on a hiking holiday near Mount Toubkal by a group of brainwashed killers.
Their bodies were discovered by French hikers on Monday morning while four extremists suspects with links to ISIS have been arrested.
And now cops have revealed nine others have been arrested in connection with the slayings.
Moroccan investigators say those arrested were carrying arms and “suspicious materials” used in making explosives.
The bodies of the women were found near the village of Imlil, a starting point for treks to Mount Toubkal, North Africa’s highest peak.
Authorities in Morocco consider the killings a terrorist act.
A plane carrying the caskets of the two slain European tourists has taken off from Casablanca for Denmark.
The friends lived in southern Norway, where they attended university.
Norwegian criminal investigators are now trying to map the women’s activities before their departure for the village of Imlil.
Meanwhile, chilling footage circulating on social media shows a woman screaming while a man cuts her neck with what appears to be a kitchen knife.
During the video, the perpetrators cry out: “It’s Allah’s will” and are heard saying: “This is revenge for our brothers in Hajine in Syria. These are your heads, enemy of God.”
A separate clip published on Twitter on Thursday appeared to show four men suspected of murdering the tourists pledging their alliance to ISIS leader Abu Bakr al-Baghdadi.