Inmates in four Italian prisons have revolted over new rules introduced to contain the coronavirus outbreak, which include a ban on family visits, a prison officers union said Sunday.

Prisoners at jails in Naples Poggioreale in the south, Modena in the north, Frosinone in central Italy and at Alexandria in the northwest had all revolted said the union, Osapp.

At Modena, near Bologna, two prison officers were injured and around 20 staff members had to leave the prison after the inmates revolted. The prison was now being guarded by police officers, the Ansa news agency reported.

At Frosinone, south of Rome, police had to be called in to restore order after about a hundred prisoners barricaded themselves into a section of the prison.

The protesting inmates drew up a list of demands, including the right to have visits from their loved ones, and tried to negotiate with the prison management, the Agi news agency reported.

And families of some of the inmates at Poggioreale, a suburb of Naples, gathered outside the prison to support them.