One person is reported to have died in clashes between Tunisian security forces and supporters of the hard-line Islamist Ansar al-Sharia group.
Tunisia's state-run news agency said the man killed May 19 in a suburb of Tunis was a supporter of the Salafist group, which promotes an ultra-conservative version of Sunni Islam.
The Interior Ministry said 11 members of the security forces and three protesters were injured.
The violence came after security forces blocked Ansar al-Sharia from holding its annual congress in the city of Kairouan.
Clashes were reported in both Kairouan and the Tunis suburb of Ettadamon.
Islamists have grown increasingly active in Tunisia since the January 2011, overthrow of secular President Zine El-Abidine Ben Ali.
The U.S. Embassy in Tunisia was attacked last September.
Based on reports from AP, AFP and dpa