More trouble has broken out amid economic strife in Tunisia, the country that spawned the Arab spring uprisings.
Scores of people are reported to have been injured after two days of clashes between protesters and police in Siliana, a town on the edge of the Sahara desert.
Calm was said to have returned by Wednesday night.
Demonstrators have called for the release of prisoners held since last year’s violence, as well as more resources to develop the impoverished region.
Hospital sources said at least 206 people were injured. The Interior Ministry said 16 of those hurt were policemen.
A lack of jobs and investment has hit the region hard as Tunisia’s Islamist-led government struggles to revive the economy.