Four people have been arrested by gardaí in Co Limerick as part of an investigation into the murder of a man in 2010.
Lee Slattery, a father-of-one from Ballynanty on the northside of the city was shot dead and found buried in a shallow grave in a wooded area on the grounds of the derelict Delmege House, which is located on the Knockalisheen road behind the Moyross estate, on the evening of May 31 2010.
He had not been seen for the previous four days after he visited a friend's house in the city on the night of 27 May 2010.
A post-mortem examination established he had been shot a number of times before being buried.
Two women in their 20s and 40s and two men in their 20s and 30s were arrested today.
They are being held for questioning at garda stations in the Limerick and Clare area.
Gardaí say the investigation into Mr Slattery's death remains "live and active".
They have appealed with any information to contact them at Mayorstone Garda Station on 061-456980.