CLÉON, France — A passenger train carrying around 180 people derailed in northern France on Friday evening, leaving 44 passengers injured, including one person reported to be in critical condition, as investigators work to determine what caused the terrifying accident.
The regional TER train was traveling between Rouen and Caen in Normandy when it derailed near the town of Cléon in the Seine-Maritime department, according to French authorities and railway officials. The accident occurred at around 7:45 p.m. local time on September 11.
Initial reports indicated a lower number of injuries, but the toll later rose to 44 as emergency teams assessed passengers and transported the injured for treatment.
One Passenger in Critical Condition
French authorities said one of the injured passengers, reported by several outlets as a young woman, was in critical condition and was evacuated by helicopter to a hospital in Rouen.
The train was carrying approximately 180 to 186 passengers, according to various official accounts and media reports. Emergency services mounted a major response, with French Transport Minister Philippe Tabarot saying around 140 firefighters were deployed to the scene.
Authorities activated France’s emergency response procedures for incidents involving multiple victims as rescuers worked to evacuate and treat passengers.
What Caused the Train to Derail?
The exact cause of the derailment remains under investigation.
According to early information cited by international media, the train may have struck an unidentified object before leaving the tracks. However, investigators have not yet publicly established the precise sequence of events or confirmed what the object was.
French police and railway authorities have launched an investigation into the accident. Reports from France also said tests conducted on the train driver were negative, while judicial authorities opened an inquiry to determine the circumstances behind the injuries.
That leaves a crucial question unanswered: What was on the tracks, and did it directly trigger the derailment?
Rail Services Suspended as Investigation Begins
The derailment forced authorities to suspend rail traffic on the affected line while emergency crews and investigators worked at the scene.
SNCF Réseau said its immediate priority was caring for passengers before restoring safe rail operations. Power was also cut on the affected section to allow rescue personnel to work safely, according to reports.
The disruption affected connections between Rouen and Caen, with wider impacts also reported on surrounding rail services, while alternative transportation arrangements were being considered for stranded travelers.
A Terrifying Night for Nearly 200 Passengers
The scale of the emergency underscores how quickly a routine regional train journey turned into a major rescue operation.
With nearly 200 people aboard, the derailment triggered a massive deployment of firefighters, police officers, railway personnel and medical teams. French authorities urged the public to avoid the affected area near Cléon as rescue operations continued.
While most of the injuries were not reported as life-threatening, the critical condition of one passenger and the large number of people requiring medical attention have intensified concerns over the circumstances surrounding the crash.
Investigation Now Focuses on the Tracks
Investigators now face the task of determining whether the unidentified object reportedly struck by the train was the direct cause of the derailment or whether other mechanical, infrastructure or operational factors were involved.
Officials have not yet released a final explanation, and SNCF has said the cause remains under investigation.
For passengers and families, the questions remain urgent: How did a train carrying nearly 200 people derail on one of Normandy’s regional routes—and could the accident have been prevented?
As investigators examine the wreckage and the railway line, French authorities are expected to provide further updates on the condition of the injured and the cause of the derailment.

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