According to the below link:
…initial indicators suggest that an ax-wielding assailant may be linked to an ever-increasing"lone-wolf" and apparently unprovoked attacks by Islamic assailants.
COMMENT: Factually established, seemingly isolated and independent attacks may in fact be interrelated.
Logic warrants that often-reluctant local, state and federal officials in targeted governments have an inherent obligation to determine whether such attacks are in fact acts of domestic terrorism with a trail leading to Islamic terrorism motives.
I again refer our readers to the below book review I offered months ago: