Gardaí say the results of a post mortem will determine the course of the investigation.
A forensic examination on a car, in which a six-year-old boy was found dead, in county Waterford has concluded.
The car has been removed from the scene at Rathmoylan Cove beach in the past hour and door to door inquiries are continuing.
A woman in her late 30s, arrested at the scene after midnight, remains in custody.
Gardaí say the results of a post mortem will determine the course of the investigation.

Clane Law Student Charged In Connection With Intercepted Bomb Appears In Monaghan Court
Fire Crews Remain At Scene Following Major North Dublin Scrapyard Blaze
Former Kill Resident to Represent Ireland at British Transplant Games
Brenda Fricker Remembered As A "True Legend" At Funeral Today
Family Of Carlow Designer Files $50m US Lawsuit
Just 20 Homes Available Within HAP Limits Nationwide
Minister Heydon Visits UK To Strengthen Irish Beef Trade
Back-To-School Costs, Including Paying For Digital Devices, Causing Major Concerns For Parents