Fires on French railway tracks have delayed journeys for 800,000 travelers in what the transport minister described as “coordinated attacks of malicious intent.”

A co-ordinated arson attack on the French rail system is turning the first weekend of the 2024 Summer Olympics in Paris into a nightmare for hundreds of thousands of travelers.

French rail company SNCF announced on Friday its high-speed train system had been hit by “deliberate arson attacks to damage [its] facilities” causing delays and cancellations which are expected to last all weekend.

The disruptions are affecting trains heading East, North and West of Paris, and travelers have been asked to postpone their plans.