French police discovered and apprehended members of a neo-Nazi cell accused of planning to attack Jewish or Muslim houses of worship, Agence France-Presse reported on Tuesday.
Five members of the group, who were "close in ideology to the neo-Nazi movement" were charged between September and May over the alleged plot, a source close to the investigation said.
"The investigation suggested they were developing an ill-defined plot to carry out an attack, likely to target a place of worship," a French judicial source said, giving no details on motives or specific targets.
Police in the southeastern city of Grenoble first arrested a man on weapons charges in September 2018. The investigation led them to the four other suspects, two of them minors.
Anti-terrorism officers continued the investigation in January, charging the suspects with terror-related offenses, including manufacturing and transporting explosive devices and participating in a terrorist conspiracy.
Since 2015, France has experienced a number of devastating attacks carried out by jihadists against its civilian population. In recent months, reports have highlighted attack plots originating from far-right extremist groups.
In November, French police arrested six people over an alleged plot to assassinate President Emmanuel Macron.
In June 2018, 13 people with links to the radical Action des Forces Opérationnelles (Operational Forces Action) group were arrested by anti-terrorist police over an alleged plot to attack Muslims.