A 15-year-old boy has died after being found hanged in his cell in Lancashire, the Prison Service has confirmed.
Liam McManus had not been identified as being at risk
Liam McManus, of St Helens, Merseyside, was discovered by staff at Lancaster Farms Young Offenders' Institution on Thursday morning.
Staff and paramedics tried to resuscitate him but he was pronounced dead at the facility.
The teenager was sentenced earlier this month to one month and 14 days for breaching a supervision order.
A Prison Service spokesman said he was in a single cell but had not been identified as being at risk of self-harm.
A statement from the service said: "Our deepest sympathies are with Liam's family and friends.
"As with all deaths in custody this will be investigated by the Prison and Probation Ombudsman."
The last under-18 death at Lancaster Farms was Gareth Price, 16, who was found hanged in January 2005.
The inquest into his death opened earlier this month at Lancaster Shire Hall.