During derailment of a 69-car convoy, 135 m³ of ammonia (NH3) from one of the cars were released into the atmosphere. 6 ammonia cars plus another 6 cars (transporting wood, stones, etc.) fell into the adjacent riverbed. More than 200 local residents had to be evacuated, 2 highways were closed. Several cars were damaged, and a few people were intoxicated by the release. The rails punctured one of the cars, whose entire contents evaporated. A state of emergency was declared during the night and evacuations proceeded over 32 km². A few hospitalisations were recorded. Highway traffic was reopened around 9 am the next morning. A car carrying stones had missed a switch, deteriorating 60 m of track and causing the derailment. The alarm was sounded by an eyewitness who heard the accident and smelled the NH3.