French officials have issued an international arrest warrant following the abduction of an eight-year-old girl last week.
The child and her mother were found in Switzerland on Sunday, days after she was taken from her grandmother's house.
Four men have already been detained over the kidnapping, which is believed to have been ordered by the girl's mother. She has also been arrested.
But the investigation has now turned to a 55-year-old man based in Malaysia.
The suspect, Rémy Daillet-Wiedemann, is believed to have played a role in organising the abduction, the prosecutor in the French city of Nancy said.
Mr Daillet-Wiedemann told the news channel BFMTV that the case did not involve "a kidnapping, but rather the return of a child to her mother at her request".