A 25-year-old man is due to appear in court this morning accused of stabbing his parents during a violent assault in north Dublin.
David Dignam and Phyliss Dreelan were injured during the attack at their home in Darndale at the weekend.
Gardaí believe the couple were set upon as they slept in a downstairs room shortly after 7am on Saturday.
Mr Dignam, who is in his 40s, was stabbed at least 10 times in the neck, shoulder and chest, while Ms Dreelan, who is in her 50s, also suffered knife wounds attempting to come to his aid.
A family member alerted gardaí who arrested the suspect close to the scene at Snowdrop Walk a short time later.
The 25-year-old, understood to be the couple's son, was quizzed at Coolock garda station over the weekend and is due to be charged with two counts of assault causing harm as well as producing a weapon.
He is expected to appear before Dublin District Court in the Criminal Courts of Justice this morning.
Detectives have also recovered a large kitchen knife they believe was used during the attack. They are still attempting to establish a motive for the incident and are investigating reports the suspect may have taken drugs in the hours before the incident.
"Why this happened isn't yet clear, it was a very violent assault and the male still remains in a serious condition in hospital," a senior source told the Irish Independent.
"Early indications are that the couple were attacked while they slept on a couch in the sitting room," the source added.
Mr Dignam had initially been described as being in a critical condition and Ms Dreelan as having sustained non-life threatening injuries.
However, his condition has since been upgraded to stable.
Both he and Ms Dreelan are continuing to receive treatment at Beaumont Hospital.
The house was sealed off for a technical examination by forensic officers.
A Garda spokesman said: "A man in his 20s, arrested following a stabbing incident in Darndale, remains in Garda custody.
"He is expected to appear before a sitting of Dublin District Court on Monday, June 15, at 10.30am to face charges in connection with the investigation."