"There are 30 prisoners linked to terrorist activities in our jails, and about 300 people, who represent an increased risk in terms of radicalization. All of them are under control," Orlando told the Italian La7 television channel.
He said that the penitentiary system has recently been exposed to a number of measures for coordination and monitoring, because prisons are a place where radical ideas spread rapidly, and prisoners may easily become involved in terrorist activities.
Over the past two weeks, a wave of attacks has occurred in Europe, including a truck running over a celebrating crowd in France's Nice and a suicide bombing near an open-air music festival in Ansbach, a city in the German state of Bavaria, which made Europe urgently and extensively boost its safety and security measures.
Earlier in the day, Italy's Defense Minister Roberta Pinotti said that there was currently no country in the world with a zero risk of terrorist threat.