At least 78 people have been killed since a wave of protests began last month.
Three days of mourning began on Friday.
Meanwhile Tunisia’s Prime Minister Mohammed Ghannouchi has promised to leave politics after elections being planned in the wake of President Zine Al Abedine Ben Ali’s fall last week.
Mr Ghannouchi said he will quit in the shortest possible timeframe.
His interim government has promised to hold polls within six months, but it has so far not set a date.
On Saturday, thousands of protesters, including police, took to the streets of Tunis to demand that the cabinet resign.