Hundreds of Tunisian protesters have been demonstrating outside the prime minister's office to demand the removal of members of the ousted president's regime still in the government.
The rally in Tunis was taking place a day after authorities fired tear gas at protesters in the same area.
There was further violence as some demonstrators shattered the windows of police cars.
Many people, bundled up in blankets, slept outside near the prime minister's office overnight.
They camped out in defiance of a curfew initiated in response to unrest which forced president Zine El Abidine Ben Ali to flee Tunisia on January 14.
Tunisia's so-called "Jasmine Revolution" has sparked scattered protests and civil disobedience in the Middle East and North Africa.
The whole region is watching to see how Tunisian democracy might play out.