Specially-trained staff took several hours to regain control of a Yorkshire prison after violence that left one inmate injured.
The disturbance at HMP Moorland began on Sunday evening and was described by the Prison Service as an "isolated incident" between a "small number" of inmates at the jail near Doncaster, South Yorkshire.
The prison, described by HM Inspectorate of Prisons as having "high" levels of violence, was not brought under control again until around 1.30am on Monday.
A Prison Service spokeswoman said that no staff were hurt and added: "We are absolutely clear that prisoners who behave in this way will be punished and could spend significantly longer behind bars".
The Category C prison holds around 1,000 inmates, reportedly including Adam Johnson, the former England footballer serving a six-year jail term for engaging in sexual activity with a 15-year-old girl.
The Prison Service would not confirm whether Johnson was involved in the incident.