Anyone who saw the black and green 'Falcon Storm' mountain bike is asked to come forward.
Gardaí say they've received "good information" on a bike which is of significant interest to the investigation into the murder of Ashling Murphy.
Anyone who saw the black and green 'Falcon Storm' mountain bike in the days or hours leading up to 4pm on Wednesday is asked to come forward.
Dozens of vigils are to take place across the country over the coming days.
Tullamore Cllr. Tony McCormack says the community has pulled together to arrange a vigil in the town this afternoon.