They are being held in Garda stations in Limerick city.
Gardaí have arrested a man and woman in connection with the death of a 4-year-old boy.
The young boy was killed in Limerick earlier this year.
The man, in his 30s, and the woman in her 20s, are being detained under Section 4 of The Criminal Justice Act 1984.
The young boy suffered fatal injuries at a house in Rathbane, Limerick on March 13.
He was rushed to University Hospital Limerick and was then transferred to Cork University Hospital.
Doctors decided to then transfer the 4-year-old to Temple Street Children's Hospital when his condition failed to improve.
Despite the doctor's best efforts, the 4-year-old tragically passed away in Temple Street Hospital on March 16.
