Online retailers Shein, Temu, AliExpress and Wish are being investigated in France in relation to the offence of enabling minors to access pornographic content on their platforms, the Paris prosecutor said on Tuesday.
The country's consumer watchdog had reported the four firms to the prosecution service on Sunday after raising concerns about the sale of childlike sex dolls on Shein's platform over the weekend.
The Paris prosecutor's office told the BBC that the platforms are being investigated over violent, pornographic or "undignified messages" that can be accessed by minors.
The BBC has contacted the companies for comment.
Shein and AliExpress are also under investigation over the dissemination of content related to children that are of a pornographic nature, the office said.
