Thousands of supporters of Silvio Berlusconi protested in Rome on Sunday against a tax fraud conviction that has rocked Italy's fragile coalition, but the center-right leader said the government must continue.

Addressing the 2,000-strong crowd, a subdued Berlusconi again bitterly attacked what he calls leftist judges and insisted he was innocent, but said he would continue to support the shaky coalition of his center-right People of Freedom (PDL) party with the center-left Democratic Party (PD) of Prime Minister Enrico Letta.