Here is what we know so far:
What happened?
The attacks hit the lines from cities such as Lille in the north, Bordeaux in the west and Strasbourg in the east. Another attack on the Paris-Marseille line was foiled.
Passengers gather around the departure and arrival boards at a train station. Source: Getty / Thibaud Moritz/AFP
One attack happened by lines near Courtalain, southwest of Paris, another in Pagny-sur-Moselle in northeast France and the other in Croisilles near the Belgian border.
What was targeted?
These three incidents affected France’s Atlantic, northern and eastern lines leading to mass cancellations and delays at a time of particularly heavy traffic for summer holiday travel.
SNCF chief executive Jean-Pierre Farandou said the attackers had started fires in “conduits carrying multiple (fibre-optic) cables” that relay “safety information for drivers” or control the motors for points that change rails.
Who is affected?
“There are huge and serious consequences for the rail network,” added Attal.
Passengers wait for more information inside the Montparnasse train station after damage to high-speed rail lines caused delays and cancellations on Friday. Source: Getty / David Ramos
Passenger services chief Christophe Fanichet said there were delays of 90 minutes to two hours on services between Paris and France’s north and east.
Others would be slower as they will run on regular lines not designed for high-speed trains.
What happens now?
But by early afternoon Friday, Transport Minister Patrice Vergriete said that some departures were going ahead, with “one in three” trains operating from Paris’s Montparnasse station, the terminus of the line towards Bordeaux and the Atlantic coast.
Transport Minister Patrice Vergriete called it an “obscene criminal attack”. Source: Getty / Thibaud Moritz
Long-distance ride-sharing app Blablacar said it had seen a 150-percent increase in reservations for Friday compared with expectations.
Eurostar said that one in five of its trains would be cancelled at the weekend and warned of delays on those that do run.
Who are the culprits?
SNCF CEO Farandou said railway workers doing night maintenance in central France had spotted unauthorised people, who fled when the workers called in police.
Workers operate to reconnect the signal box to the track in its technical ducts in Vald’ Yerres, near Chartres on Friday. Source: Getty / Jean-Francois Monier/AFP
Minister Vergriete said that the people had been spotted with “vans”, and “incendiary devices were found on the scene” of the attacks, calling it an “obscene criminal attack”.
NATO Secretary-General Jens Stoltenberg said in June that the alliance had seen several examples of “sabotage, of arson attempts” by Russia, but there is no indication that Moscow might have been behind Friday’s attacks in France.
What legal action is being taken?
The investigation is in the hands of criminal prosecutors. Anti-terrorism prosecutors have not been asked to handle the case.