A man suspected in the killing of two female tourists, from Norway and Denmark, in Morocco's Atlas Mountains belongs to a militant group, a prosecutor said on Wednesday, without identifying the group.

The women's bodies were found on Monday in an isolated area near Imlil, on the way to Toubkal, North Africa's highest peak and a popular hiking destination.

The man was arrested in Marrakech, Morocco's main tourist hub, and police were hunting other individuals identified as suspects.