This is the full statement from Merseyside Police:
Merseyside Police can confirm that the 15-year-old girl who died in Alder Hey Children's Hospital yesterday morning (Saturday 2 June) Rose Farley of the West Derby area. A post mortem examination has been carried out.
The examination has concluded and the cause of the death has been withheld pending toxicology results.
A 16-year-old man from the L5 area has also been arrested on suspicion of supplying controlled substances as part of the on-going investigation. He is currently in police custody and being questioned by officers.
- More than 5000 people have 'liked' a Facebook group in Rose's memory