Mason O’Connell-Conway died in March.
A woman has been released without charge in relation to an investigation into the death of a 4-year-old boy in Limerick.
On March 13th, Mason O’Connell-Conway suffered serious head injuries at a house in Rathbane - but died in hospital a few days later.
Last month, a man in his 30s and a woman in her 20s were arrested on suspicion of murder, but were released without charge.
A woman in her 20s was arrested for a second time yesterday and has been released again without charge.

Jury At Jeffrey Donaldson Trial Sent Home For Weekend
Investigation Underway After Submachine Gun Fell From The Boot Of Garda Car
Withdrawal Of Solicitor Services For Criminal Legal Aid Cases Enters It's Fifth Day
Petrol and Diesel Prices Ease After US-Iran Peace Framework
42 South Africans Deported From Ireland
Investigations Continue After Woman Injured In Dublin
Convicted Paedophile Bill Kenneally Dies
Dáil Approves Proposal To Abolish Three-Day Abortion Waiting Period