A major police investigation was launched in Paris late on Saturday after the body of 12-year-old girl was found in a trunk.
The remains were found in the courtyard of a building in the 19th district of the French capital.
According to French media, a local girl had been reported missing by her parents earlier in the day.
They also reported that three people had been arrested overnight and a fourth one on Saturday morning.
The office of the Paris public prosecutor has opened an investigation into the murder of a minor under the age of 15.
