Detectives investigating the murder of Patrick Heeran have made two arrests.
The man and woman, both aged in their mid 20s, were arrested in the midlands on Thursday and are being detained at Tullamore Garda Station.
The man is detained under Section 4 of the Criminal Justice Act, 1984, while the woman is held under Section 30 of the Offences against the State Act, 1939.
48-year-old Mr Heeran was last seen in Mohill Co Leitrim on October 3, 2011.
A murder investigation was launched by garda in Co Leitrim in 2016.
A Garda spokesman said the investigation is ongoing.