France's justice ministry says two prison guards have been injured in Corsica after an attack launched by three inmates, amid widespread protest over working conditions across the country.

A spokesman for the French penitentiary system said Friday that the violence occurred at the Borgo prison.

The two guards have been hospitalized but the spokesman said their injuries aren't life-threatening, adding that he had no details about the attack or the assailants.

French prison guards have been protesting outside scores of jails across France in recent days, demanding more security, more staff and safer handling of violent inmates.

The national protest movement was launched by the country's main prison worker unions after a radicalized inmate attacked three guards with a knife at a high-security prison in northern France last week.