American comedian Bill Cosby is not going to be prosecuted in connection with a sexual assault claim dating back to the 1970s, one of a series of allegations publicised in recent weeks.
It is alleged that he assaulted a teenage girl in 1974, US prosecutors say.
They cited the statute of limitations which restricts the length of time in which legal action can be taken after an alleged crime has been committed, the BBC reports.
Judy Huth alleges that Mr Cosby molested her when she was 15. She is one of at least 15 women who since early November have alleged that Mr Cosby sexually assaulted them.
The comedian's lawyers have denied most of the allegations, while dismissing others as either being discredited or decades old.
Most of the women concerned say that the comedian drugged them before assaulting them.
Ms Huth claimed that she was forced by Mr Cosby to perform a sex act on him at the Playboy Mansion in Los Angeles.
Mr Cosby's lawyer has accused her of trying to extort $US250,000 from the star before she decided to sue - he also accused her of trying to sell her story to a tabloid a decade ago.
The actor has never been charged with a crime, but the accusations have led to his stand-up tour being called off and the cancellation of a number of television projects.