Four men in Quebec, including two active members of the Canadian Armed Forces, were arrested and charged in what Canadian police say is a case of “ideologically motivated violent extremism.”

Four men — including two members of the Canadian military — have been arrested in what authorities describe as a terrorist plot to “forcibly take possession of land in the Quebec City area,” a case a veteran extremism expert calls unprecedented.

The suspects are accused of stockpiling an extensive arsenal and conducting military-style training while building an anti-government militia, police said.