Gardaí in Kilkenny are renewing their appeal for information into the 1984 murder of Marie Tierney.

The 34-year-old was killed on an unknown date between October 21st and December 21st that year.

She was a married woman with two children, who ran a grocery store and petrol station.

She was reported missing on October 22nd 1984 by her husband after she left their house at Clintstown night before and not returned.

Marie Tierney pictured in 1984 | Image: Garda press office

Investigating gardaí found the car - a Renault 18 estate, registration number 35-HIP - at Newpark Fenn in Kilkenny on October 22nd.

Statements from a number of witnesses put the car abandoned in Newpark at approximately 11.00pm on the 21st.

A number of searches were carried, but Marie was not found.

Undated photo of Marie Tierney | Image: Garda press office

Then on December 21st, her body was discovered by a man out walking on the Bleach Road, Kilkenny in a ditch.

A post mortem examination was carried out and a murder investigation was launched.

Gardaí say over 500 lines of enquiry have been opened, and over 200 witness statements recorded.

They are appealing to any member of the public who may have seen people walking or cycling at or near Newpark/Newpark Fenn, Kilkenny on the night of October 21st 1984.

And they are appealing to people who have not yet made themselves known to gardaí or who, for whatever reason, were unable to make themselves available at the time.