A passenger train derailed Friday evening in Normandy, France. At least 44 people were injured.

One injured passenger was in serious condition. The train was traveling from Rouen to Caen.

Local officials said 186 passengers were on board. The derailment happened near Cléon in Seine-Maritime.

Workers found a piece of rail on the track. French authorities are investigating if it was placed deliberately.

They want to know if sabotage caused the crash. Sabotage has not been confirmed as the cause.