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Paris prosecutors probe alleged foreign smear campaigns in local elections

Published by Global Banking & Finance Review

Posted on May 27, 2026

3 min read

· Last updated: May 27, 2026

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Paris Prosecutors Probe Foreign Meddling in Local French Elections

By Gabriel Stargardter

Investigation into Alleged Foreign Interference in French Elections

Background of the Probe

PARIS, May 27 (Reuters) - Paris prosecutors have opened a probe to determine whether three hard-left mayoral candidates were targeted by a foreign state seeking to meddle in French elections, they said on Wednesday, in a move that could help shed light on the mysterious campaign.

Reuters revealed this month that French officials suspect the alleged smearing of three mayoral candidates from the pro-Palestinian party France Unbowed (LFI) ahead of March's municipal elections was carried out by an obscure Israeli firm called BlackCore.

Details of the Smear Campaign

The campaign included deceptive websites and social media accounts alleging criminal behaviour, as well as disparaging digital ads, sources familiar with the matter told Reuters.

Prosecutors' Response and Legal Framework

The decision by Paris prosecutors to open an independent, unsolicited probe underlines the mounting pressure French authorities were under to provide answers over incidents that raised awkward questions about the security of French elections. 

Their investigation will include elements from separate probes underway in Marseille and Toulouse, while also adding the firepower of a specialized national cyber police force.

Definition of Foreign Interference Under French Law

Under French law, foreign interference refers only to actions carried out by a foreign state, the office said, adding that "no suspicion of intervention of this type had been reported." If a foreign company or individuals from abroad are found to have commissioned the alleged smear campaigns, they would not be guilty of foreign interference. 

Scope and Focus of the Investigation

The investigation is being led by prosecutors from a section in charge of military affairs and attacks on the fundamental interests of the nation, prosecutors said.

Suspected Crimes

The suspected crimes include foreign espionage, election fraud carried out with false news or fraudulent manoeuvres, and online advocacy of terrorism, they said. 

Targets of the Operation

The operation targeted Marseille mayoral candidate Sébastien Delogu, Toulouse contender François Piquemal and their Roubaix counterpart David Guiraud, according to French authorities and the candidates themselves.

Their party is regularly accused of antisemitism by some Jewish community ‌leaders and political ⁠rivals - claims it denies - while many business figures fret about its high tax-and-spend policies.

About BlackCore

Before scrubbing its online presence following Reuters' enquiries, BlackCore described itself as "an elite influence, cyber, and technology company built for the modern era of information warfare." It said it provided governments and ​political campaigns with "cutting-edge strategies, advanced tools, and robust security to shape narratives." 

It has not responded to repeated messages.    

(Reporting by Gabriel Stargardter and Dominique Vidalon; Editing by Andrew Cawthorne)

Key Takeaways

  • The probe covers deceptive websites, social media accounts and targeted digital ads accusing LFI candidates of criminal behavior and possibly linked to Israel‑based firm BlackCore, although no foreign state involvement has been confirmed
  • The inquiry is being led by the Paris prosecutor’s military-affairs section and draws expertise from the national cyber police, integrating elements from parallel investigations in Marseille and Toulouse
  • Under French law, foreign interference must involve a foreign state; if a private company or individuals are found responsible, it won’t qualify as state interference, though the alleged acts may still violate laws on espionage, election fraud, or online terrorism

Frequently Asked Questions

Which French mayoral candidates were allegedly targeted by foreign smear campaigns?
Marseille's Sébastien Delogu, Toulouse's François Piquemal, and Roubaix's David Guiraud were reportedly targeted.
Who is suspected of orchestrating the smear campaigns against French candidates?
An obscure Israeli firm named BlackCore is suspected of orchestrating the campaigns.
What tactics were allegedly used in the smear campaign?
Tactics included deceptive websites, social media accounts, and digital ads alleging criminal behavior.
What crimes are being investigated by Paris prosecutors?
Suspected crimes include foreign espionage, election fraud with false news, and online advocacy of terrorism.
Is foreign interference defined as actions by companies or individuals from abroad under French law?
No, under French law, foreign interference refers only to actions carried out by a foreign state.

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