Supporters of former South Korean president Park Geun-hye have asked a United Nations body to investigate whether her detention during her corruption trial prevented Park from accessing proper medical treatment, a barrister said on Tuesday.

Park, ousted earlier this year and in detention since March, is undergoing a lower court trial for charges of abuse of power and bribery. Her current detention period for the lower court trial is due to end on October 17, which the prosecution asked the court to extend on Tuesday.

A legal team working for Park's supporters has asked the U.N. Working Group on Arbitrary Detention in Geneva to look into whether Park was given medical treatment and whether there were procedural irregularities in her current trial, said Rodney Dixon QC, a London-based human rights barrister.