Two prison guards were taken to the ER with minor injuries after a revolt broke out at Milan's Beccaria Juvenile Jail on Monday.
Carabinieri police intervened to stop the riot after inmates set a mattress on fire on the second floor of the building.
The two officers were wounded when detainees hurled objects during the protest while a few detainees, a doctor and more officers suffered smoke inhalation, according to prison authorities.
They were treated at the prison.
The fire was extinguished and the riot was over, they said.
A number of riots were reported at the Beccaria prison last year, including in May when mattresses were set on fire to create chaos and enable a group of detainees to unsuccessfully attempt an evasion.
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