Tunisian police have broken up a fourth day of anti-government protests in the capital Tunis.
They fired tear gas to force the demonstrators away from a central avenue.
The scenes were similar to Saturday’s violence when stone-throwing youths clashed with police.
An overnight curfew failed to stop trouble breaking out during the day.
Tunisia has struggled to restore stability since former President Ben Ali was ousted.
Many young demonstrators are calling for the government’s resignation, fearing it will go back on its commitment to democracy after decades of autocratic rule.
Tension is growing ahead of July’s election. The interior minister has warned that the rise of one Islamist group could spark a coup.
Critics have accused the police of aggressive tactics, which have been described as a return to the days of Ben Ali.
On Friday the government apologised after tear gas and truncheons were used against protesters.
Time will tell whether these are the early teething troubles in a newborn democracy – or evidence that the old regime’s divisions will not be easily healed.