Police are continuing to treat the death of a Lisburn toddler as "unexplained" after post-mortem results were inconclusive.
The three-year-old boy died suddenly on Thursday, sparking a police investigation.
Officers were called to a house in Trinity Terrace, in the Tonagh area of Lisburn, at around 2.20am.
When they arrived the boy had already died.
A PSNI spokesman said no arrests had been made and officers are awaiting the results of further tests.
A red toy truck lay in the front yard of the house as officers guarded the property in a patrol car on Thursday evening.
Meanwhile detectives from Lisburn CID made door-to-door enquiries to try to establish the circumstances surrounding the boy's sudden death.
Neighbours said residents of the newly refurbished terrace, located behind a Domino's pizza takeaway and near Holy Trinity Nursery School, had moved in to the busy side street just a few months ago.
It is believed the occupant of the home is a young woman aged in her mid to late 20s.