Norway says video from Morocco is likely authentic following double murder

Police in Norway say a video that allegedly shows the killing of a Scandinavian university student in a remote part of Morocco's Atlas Mountains likely is authentic.

Norway's National Criminal Investigation Service has been investigating the footage circulating on social media. It says that "there is no concrete evidence indicating the video is not real."

Four men have been detained in Morocco, and authorities there consider the killings of two students to be a terrorist act.

The women, Louisa Vesterager Jespersen, 24, from Denmark, and Maren Ueland, 28, from Norway, had been hiking. Their bodies were discovered Monday with stab wounds in their necks.

Morocco is generally considered safe for tourists but has been routing out Islamic extremists for years.