The victim of the sexual assault committed by Roman Polanski has called for charges against the film director to be dismissed, BBC reported, citing court documents.

Lawyers for Samantha Geimer, who was 13 when Polanski had sex with her in 1977, urged a dismissal in a motion filed at a California appeals court on Friday.

She had suffered health problems after being hounded by the media following Polanski's arrest last month, it said.

The director is currently being held in Switzerland on a US arrest warrant.

On Friday, the US embassy in Bern submitted a formal extradition request, on which the Swiss authorities must rule within 40 days.

Swiss officials informed the US that the 76-year-old was travelling to Zurich from France to collect an award at the city's film festival.

The papers filed on behalf of Geimer, who lives in Hawaii, ask judges at California's 2nd District Court of Appeal to rule on a previous motion to dismiss the charges against Polanski.

Claiming that Polanski had been forced to flee by a "corrupt" judge, they state: "No matter what his crime, Polanski was entitled to be treated fairly; he was not."

They also complain that Geimer is being stalked by journalists from news outlets and talk show producers, and that she and her lawyer had received nearly 500 telephone calls in a month.

"Larry King has called, Oprah has called, every national network morning show has called. The LA Times has three reporters calling, as do nearly every major newspaper in the United States and abroad. The response - 'Please leave me alone.' But they won't."

"The pursuit has caused her to have health-related issues," the court papers add.

"The pursuit has caused her performance at her job to be interfered with and has caused the understandable displeasure of her employer and the real possibility that Samantha could lose her job."

The filing ends with the request: "Leave her alone."