The OVRA compiled files on around 130,000 potential subversives with the aid of a network of approximately 100,000 informants, and by 1930 they were organising around 20,000 raids each week. It is believed that about 6,000 of the people arrested by the OVRA, mainly communists and members of the Giustizia e Libertà, were either tried by the Tribunale Speciale or sent into exile on remote Mediterranean islands. The conditions in these places were extremely poor, so many anti-fascists simply left Italy for their own safety.