Paris terror police examine unexploded devices left on rail network

Men in hi-vis suits and police officers work on a rail track
Police and rail workers inspect the scene of one sabotage attack on Friday - Denis Charlet/Getty

The French authorities are analysing unexploded incendiary devices to track down the perpetrators of a co-ordinated series of arson attacks that paralysed the rail network before the Olympic Games opening ceremony on Friday.

Security forces have found several devices in the Yonne region, between Paris and Lyon, left behind by two men who were thwarted by rail workers.

Investigators are also inspecting four unexploded devices found on May 8, the day the Olympic flame arrived in Marseille, on the high-speed rail line connecting Aix-en-Provence and Marseille. So far, no link has been confirmed with Friday’s attack.

People stand on a crowded station concourse
Baffled passengers wait in Gare du Nord in Paris on Friday - Ritchie B Tongo/Shutterstock

Anti-terror police are involved in the investigation, with tests being run on samples taken by police from three burnt and damaged signal boxes, in the hopes of uncovering fingerprints of the culprits behind the attack.

In the early hours of Friday there was massive and co-ordinated sabotage of the country’s high-speed rail tracks, knocking out most lines to and from northern, eastern and western France.

Saboteurs set fires in pipes that contained signalling cables, causing damage that will now require meticulous repair, one cable at a time, according to French state-owned rail operator SNCF.

The sabotage was “a premeditated, calculated, co-ordinated attack”, said Jean-Pierre Farandou, chief executive of SNCF.

The minister is surrounded by a throng of reporters
Patrice Vergriete, the deputy transport minister, meets press on Friday - Thibaud Moritz/AFP

Gabriel Attal, the prime minister of France, echoed those words, calling the attacks “prepared and co-ordinated”.

The attacks were launched during one of France’s busiest travel periods, on the opening day of the Paris Olympics. The travel disruption which ensued on Friday was expected to last throughout the weekend.

Three out of 10 high-speed trains in France were expected to be cancelled on Saturday on routes impacted by the attacks.

A flotilla in Marseille harbour with fireworks and smoke bombs going off in tricolor colours
The Olympic flame arriving in Marseille in May - Sylvain Thomas/Getty

However, SNCF said that passengers who had not received any messages about changes or delays could expect to board and travel as planned.

One in four Eurostar trains were also cancelled for the weekend. Trains going to and from Paris were running on the “classic line”, instead of high-speed, extending trip durations by about 90 minutes.

Eurostar also asked travellers to consider postponing trips. Some 800,000 passengers were expected to have been affected by Sunday.

Broaden your horizons with award-winning British journalism. Try The Telegraph free for 3 months with unlimited access to our award-winning website, exclusive app, money-saving offers and more.