Gardaí will prepare an extensive file for the Director of Public Prosecutions after a major investigation into the murder of Marie Tierney almost 35 years ago.

A man who was arrested in relation to the investigation into the murder of Marie Tierney has been released without charge.

Detectives investigating the murder of a woman 35 years ago have made a breakthrough in the case with the arrest of a suspect for the crime.

A man in his 70s has been arrested by gardaí investigating the 1984 murder of 34-year-old Marie Tierney.