A post-mortem examination into the death of a boy who died four days after being sent to a secure youth training centre has proved inconclusive.
Gareth Myatt arrived at Rainsbrook on Friday
Gareth Paul Myatt, 15, of Stoke-on-Trent, Staffordshire, died on Monday.
He had just begun a year in detention at Rainsbrook Secure Training Centre near Daventry, Northamptonshire, for assault and theft.
Following a post mortem examination at the Leicester Royal Infirmary, police said further tests will be carried out.
An ambulance was called to the centre after Gareth reportedly lost consciousness.
He was pronounced dead at Walsgrave Hospital in Coventry.
Northamptonshire Police said on Wednesday a senior investigating officer has been appointed to oversee the case and an incident room has been set up at Towcester Police Station.
The privately-run Rainsbrook Centre houses 76 youngsters aged from 12 to 17, most of whom have been convicted of serious crimes.