Five people have been arrested in Limerick in connection with the murder of Lee Slattery.
The 24-year-old's body was found in a shallow grave on the outskirts of the city at the end of last month, several days after he had been reported missing.
A post mortem examination revealed he had been shot a number of times.
Investigating gardaí arrested three men and two women - aged between 19 and 27 - this morning.
They are being held at various garda stations in Limerick on suspicion of withholding information.