A French art dealer has been taken into custody after Picasso's step-daughter accused him of stealing some of the artist's works, a judicial source said Wednesday.

Catherine Hutin-Blay, the daughter of Pablo Picasso's second wife Jacqueline Roque, filed a complaint against art dealer Olivier Thomas in March after noticing some of her paintings were on the market, the source said, confirming a report in British daily "The Telegraph."