Mr Delaney was reported missing by his family in 2019.
Gardai in Laois have arrested three people in connection with the investigation of the murder of William Delaney.
Mr Delaney was reported missing in March 2019 before his investigation was upgraded to a murder in June of that year.
He was a Tipperary man living in Portlaoise who left the General Hospital in the town where he'd been a patient on the 30th January 2019.
Gardai established he collected his welfare payment at the post office and, was last seen at 3 pm that day in Monasterevin outside a premises known locally as the Hazel Hotel.
He was then reported missing by his family on Wednesday 6th March, 2019.
In June of that year, Gardai received information that William Delaney had been killed and that his body had been buried at a location in Laois.
A search was conducted in the area surrounding the Rock of Dunamaise with no remains found.
The arrests made today are of two women, one in their 30’s and one in their 50’s, and a man in his 30’s who are currently being detained at Garda Stations in the Midland and South Western regions
Enterprise Minister Says Midlands Still Offering Strong Company Growth
Agreement Reached On Westmeath Hospice Care Beds
Westmeath Town Awarded For Night Time Economy
Report Expresses "Deep Reservations" Over Death Of Cloverhill Prisoner
Appeal Lodged Against 20 Homes In Westmeath
Laois Floods Cause Serious Safety Concern
HSE In Talks With Offaly Concrete Company Over Midlands Hospice Appeal
The F1 Journey Can Cost North Of €30m - Alex Dunne
Offaly TD Demands Stronger Enforcement Against Sulky Racing
Westmeath Space Innovation Centre Is Exciting - Enterprise Minister
Laois And Westmeath Primary Students Awarded For Filmmaking Skills
Housing Minister Opens Over 200 Homes In Laois
RSA Urges People To Cut Back Hedgerows
Republic Of Ireland To Face Israel In Nations League
Ireland’s First European Space Agency Launches in Westmeath
High Court To Hear Fair Trial Challenge In Alleged Mosque Plot Case
Westmeath Research Firm Launch SME Digital Transformation Programme
Midlands Braced For Freezing Conditions As Temperatures Set To Drop
Man In His 20s To Appear In Court Over Alleged Crime Gang Activity
Ryanair Chief Warns US Could Block Aer Lingus Flights Over Airport Cap