The suspect, who is in his 50s, was arrested shortly after a murder inquiry.
Gardaí fear Kerry grandmother Miriam Burns was beaten to death in her home by someone known to her.
The revelation came as Gardaí launched a murder investigation into the death of the mother of four, who was described as “Killarney’s smiling lady”.
The suspect, who is in his 50s, was arrested shortly after a murder inquiry was launched into her death in Co. Kerry.
The 75 year old grandmother and mother of four was found dead at her home in Killarney on Monday afternoon.
Officers have until potentially tomorrow before deciding whether to charge or release the man.
Ralph Riegel, southern correspondent with the Irish Independent says he's likely to have been familiar to Ms. Burns: