Official buildings have been targeted in the western Tunisian towns of Kef and Kebili.
The trouble was sparked by the deaths of at least two protestors during demonstrations yesterday.
In Kef, the army was eventually brought in to get the situation back under control.
Three weeks after President Zine El Abedine Ben Ali was ousted from power, the situation in Tunisia remains tense.
24 regional governors were replaced after last month’s unrest and the government had announced that the curfew would be relaxed yesterday.
But some have been angered by the appointments and say a clean sweep is needed.
The former and current government both say opposing supporters are responsible for the unrest.