MOSCOW, September 24 (RIA Novosti) - Russia's Federal Penitentiary Service said on Wednesday that it had restored order in a jail in the Volga city of Samara, where 13 inmates were injured in violence.

Violence in the city's maximum security penal colony broke out late on Tuesday, when a group of prisoners set fire to a building scheduled for demolition, and then attacked other inmates. Four of the injured inmates have been hospitalized.

"The situation is stable and under control," a spokesman for Russia's prison service said.

An investigation into the incident is underway.

The prison has over 2,000 inmates, of which around 700 are serving sentences of more than 15 years.