Bruce Lehrmann
Bruce Lehrmann (Image: AAP/Mick Tsikas)

The judge in the high-profile rape trial of Bruce Lehrmann says she was left with no choice than to discharge the jury after a juror admitted accessing information that was not presented as evidence in court.

Chief Justice Lucy McCallum summoned the 12 jurors who had been struggling to reach a unanimous verdict to the ACT Supreme Court on Thursday morning. She explained a juror had admitted to obtaining material that was not included in the trial after material relating to the prevalence of false rape accusations had been discovered by a security officer.