The French national rail company says high-speed lines have been hit arson attacks that heavily disrupted traffic on the day of the high-risk Olympics opening ceremony.
"This is a massive attack on a large scale to paralyse the TGV network," SNCF told AFP, adding that many routes would have to be cancelled.
"SNCF was the victim of several simultaneous malicious acts overnight," the national train operator said, later adding that vandals had damaged signal boxes along the lines connecting Paris with 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.
French officials condemned the attacks as “criminal actions,” though they said there was no sign of a direct link to the Games, and prosecutors in Paris opened a national investigation saying the crimes could carry sentences of 15 to 20 years.
“It’s a hell of a way to start the Olympics,” said Sarah Moseley, a 42-year-old traveler waiting at the Gare du Nord station in Paris as she learned that her train to London was delayed by the rail chaos.
As Paris authorities geared up for a spectacular parade on and along the Seine River, three fires were reported near the tracks on the high-speed lines of Atlantique, Nord and Est, causing disruptions that affected hundreds of thousands of travelers.
Among them were two German athletes in showjumping who were on a train to Paris to take part in the opening ceremony but had to turn back in Belgium because of the closures, and will now miss the ceremony, German news agency dpa reported.
“There was no longer a chance of making it on time,” rider Philipp Weishaupt, who was traveling with teammate Christian Kukuk, told dpa.
There were no known reports of injuries.
French Prime Minister Gabriel Attal said France’s intelligence services have been mobilized to find the perpetrators and of "acts of sabotage” which he described as “prepared and coordinated.”
Attal said that sabotage and arson that hit key parts of France’s high speed rail network on the eve of the Olympics had “a clear objective: blocking the high speed train network.”
The attacks were launched as Paris was under heavy security ahead of the opening ceremony of the Summer Olympics, with 300,000 spectators and an audience of VIPs expected at the event.
The parade on Friday evening will see up to 7,500 competitors travel down a six-kilometre (four-mile) stretch of the river Seine on a flotilla of 85 boats.
It will be the first time a Summer Olympics has opened outside the main athletics stadium, a decision fraught with danger at a time when France is on its highest alert for terror attacks.
Sports Minister Amélie Oudéa-Castera said authorities are working to “evaluate the impact on travelers, athletes, and ensure the transport of all delegations to the competition sites” for the Olympics. Speaking on BFM television, she said, “Playing against the Games is playing against France, against your own camp, against your country.” She didn't identify who was behind the vandalism, France 24 reported.