She was airlifted to Starship Hospital but died shortly after.
“As part of this investigation, we are looking into the circumstances of her death, which at this stage is being treated as unexplained.
“Police, including the CIB, are making further enquiries into this matter, and are gathering information about the circumstances leading up to Alestra’s death.”
He said police were working to analyse all information and were asking for anyone with information to come forward.
“The death of a child is a tragic and distressing incident for all involved and police are working to understand exactly what has happened.
“Information can be provided in person at a local police station or through our 105 reporting line by referencing file number 151003/8395.”
The public can provide information anonymously via Crime Stoppers on 0800 555 111.