Attacks on long-distance fiber-optic cables caused internet outages in several parts of France, carriers SFR and Free said on Wednesday.

The cyber section of the Paris public Prosecutor’s office opened a criminal investigation, a spokesperson told Bloomberg. The probe has been entrusted to the DGSI, the French security agency, and the judicial police.

The cables, which connect areas of Paris to the cities of Lyon, Strasbourg and Lille, were physically cut in several places, according to a person familiar with the incident who spoke on condition of anonymity.

A spokesman for SFR — owned by Altice France SA — said that the priority was to restore the network. B2B carrier Netalis called the attack a “major incident, unprecedented in its scope.”

Poster Comment:

WEF of Davos through Cyber Polygon told us this was coming.