LONDON — Roman Polanski has appeared in a court in Poland to fight a U.S. attempt to extradite him on child sex crime charges.

The hearing at the court in Krakow took place behind closed doors. A ruling is unlikely to be made until April, according to a BBC report. A further hearing has been set for April. If the court approves the request, the matter will be referred to Poland’s justice minister for a final decision.

The director, who holds dual French-Polish citizenship, is planning to shoot a film in Poland this summer based on the Dreyfus Affair.

Polanski admitted to having sex with a 13-year-old girl in 1977, while he was in the U.S. He served 42 days in prison while undergoing psychiatric tests, but fled the U.S. before the judge ruled on sentencing.