FRIENDS and colleagues of a civil servant missing for a fortnight are distributing leaflets in the area where she was last seen in a desperate attempt to piece together her movements.
Monica Riordan disappeared on December 20 after leaving the office of the government agency Pobal on Holles Street.
Dozens of her colleagues have blanketed the streets around the city centre office to speak with people and hand out flyers.
Their efforts paid off this week when a reported sighting of the 39-year-old on the corner of Macken and Pearse Streets on the day she disappeared was confirmed by gardai on Thursday.
Ms Riordan, originally from Finglas, Co Dublin, but living in Navan, was working at the Holles Street offices on the morning of December 20, but is thought to have left at about 11am.
Gardai are now hoping that the confirmed sighting of her at 5pm on the Tuesday she vanished, may help solve the mystery of her disappearance.
During that sighting, she is described as being "disorientated and confused".
Her mobile phone was handed into gardai after it was found near the Grand Canal at about 5.30pm that day.
Ms Riordan is about 5'6" in height and of medium build, with shoulder length blonde hair.
When last seen she was wearing a long grey coat, dark jeans, runners, sunglasses and carrying a dark handbag.
Anyone with information is asked to contact Pearse Street garda station at 01-6669000, or the garda confidential line on 1800 666111.
Meanwhile, gardai appealed to the public for help in tracing the whereabouts of two other missing people.
Jessica Mooney (17) has been missing from the Dublin 9 area since last Monday. She was last seen in the O'Connell Street area of the city.
She is described as being of medium build, 5' 4" in height with brown, shoulder length hair, blue eyes and a pale complexion. When last seen she was wearing a white, long sleeved top, dark leggings and was carrying a hold-all bag.
Anyone with information is asked to contact Clontarf garda station at 01-6664800.
A national appeal has also been launched to help trace a man missing from Clonmel, Co Tipperary.
Christopher Cronin (24) was last seen in the early hours of Monday at the Gashouse Bridge in the town. He was wearing a black jumper and navy jeans.
Mr Cronin is 6'1" tall, of thin build with tight brown hair. Anyone with information is asked to contact the gardai in Clonmel at 052-6177640