Gardai investigating the murder of Patricia O'Connor, whose remains were found scattered in the Wicklow Mountains in June, have arrested three people.

A 73-year-old man was arrested in County Meath, while two women aged 19 and 38 were arrested in Dublin.

They're being held at Bray and Wicklow Garda stations under Section 4 of the Criminal Justice Act.

Another man has already been charged in relation to the investigation