An Irish nanny accused of murdering a baby in her care in Massachusetts has been released on bail pending her trial.

Aisling Brady McCarthy has been in custody in the US since she was arrested in January 2013, a few days after one-year-old Rehma Sabir died.

Her trial date was rescheduled several times and has been indefinitely postponed pending a review of the medical evidence.

Today Judge Maureen Hogan released the 36-year-old on bail with several conditions.

She must wear a 24-hour GPS monitoring bracelet and be subject to house confinement.

She will be allowed to leave the property only to go to court, seek medical attention or meet her lawyers.

She must also surrender her passport, sign a waiver of extradition and the bail bond was set at $15,000 (€13,414).

This is the third time lawyers have made a bail application.

Judge Hogan said she had been in touch with the US Immigration and Customs Enforcement agency who said they "would stand down" from efforts to deport Ms Brady McCarthy if she was released with 24-hour GPS monitoring.

The judge said she had received different information in court today to what the prosecution had initially provided her with about the case.

The judge said the infant girl's vertebrae fractures were determined to have occurred in the weeks before her death, at a time when she was not in the care of the Irish woman.

However she said despite the developments and the emergence of new medical evidence, "probable cause" still existed.

When the judge announced her decision, several supporters of Ms Brady McCarthy cried and embraced.  Ms Brady McCarthy also started to cry and waved at her sister as she was led from the court.

Irish nanny released on bail ahead of Massachusetts trial