A death in the city's been upgraded to a murder investigation.
Gary O'Brien in his early fifties, was found dead at a flat on the North Circular Road on Sunday night.
He'd been shot in the head.
He was a dad and grandfather, and had been living in the area for several years.
A man and woman have been arrested in connection with the investigation into his death.
A firearm's yet to be recovered.
Superintendent Anne Markey from Bridewell Garda Station has this appeal for witnesses...
