A new appeal has been made for information about the disappearance of Fiona Sinnott almost 20 years ago.
Ms Sinnott, who lived at Ballyhitt, Broadway, in Co Wexford, was last seen socialising with friends at Butler's Pub in Broadway on Sunday 8 February 1998 and left the pub at around midnight.
A man and a woman were seen on the road near Kisha Cross, Broadway, at around midnight on the same night.
Two men, described as being in their late teens or early 20s, were also seen nearby.
None of these four people have ever come forward.
Gardaí say they are anxious to trace them, or anyone who was in the vicinity who did not or could not come forward at the time.
To date 459 inquiries have been made in the investigation, with 355 statements taken.
Anyone with information or who can assist with the investigation is asked to contact Wexford Garda Station on 053-916-5200, the Garda Confidential Line 1800-666-111 or any garda station.