French prosecutors have opened an investigation into alleged aggravated public insult and incitement to hatred or violence after a Paraguayan senator posted racist remarks targeting Kylian Mbappe following Paraguay's World Cup defeat to France.

The Paris prosecutor's office told The Associated Press on Tuesday that the investigation was launched after the French Football Federation (FFF) filed a complaint with the national unit responsible for combating online hate speech.

Celeste Amarilla, a senator from Paraguay's Liberal Radical Party, made the comments on X after Mbappe converted the decisive penalty in France's victory over Paraguay on Saturday. She targeted the France captain with racist insults about his origins, upbringing, education and appearance.

France has advanced to the World Cup quarterfinals, where it will face Morocco on Thursday.

Mbappe called Amarilla a "despicable woman" who was "unworthy" of serving in Paraguay's Congress.