Italian police raided dozens of flats across the country on Wednesday and arrested up to eight people in connection with a series of recent terrorist attacks believed to have been carried out by anarchists.
Dozens of people from the Informal Anarchic Federation (FAI) and the International Revolutionary Front (FRI), are being investigated, police said according to the news agency ANSA.
Some of the group's leaders were among those arrested.
The FAI has claimed responsibility for a series of parcel bombs in Germany, Italy and France over the past two years as well as sending them to embassies in Rome.
It also claimed responsibility for shooting and injuring Roberto Adinolfi, the chief of a state-controlled nuclear power company Ansaldo Nucleare, in Genoa last month.
Molotov cocktails and letter bombs have also been used in attacks on offices belonging to Equitalia, Italy's tax collection agency.
After the attack on Adinolfi, the FAI had threatened to carry out more attacks “one action for each of our Greek brothers,” listing the names of eight anarchists imprisoned in Greece.
The latest information from the police investigation showed that Italian and Greek anarchists were working closely together, said Gianpaolo Ganzer, the head of the special task force which carried out Wednesday's operation. – Sapa-dpa