Two Tunisian soldiers were killed and four wounded on Saturday in a gunfight with "terrorists" several kilometres (miles) from the border with Algeria, the defence ministry told AFP.
France has expelled a 28-year-old Tunisian it accuses of running a jihadi recruitment ring which is sending fighters to Syria.
The Tunisian president has declared a state of emergency in Douz, a southern desert town swept by days of clashes between rival tribes, his office said.
Tunisian Prime Minister Hamadi Jebali warned that he would resign if his Islamist Ennahda party kept opposing his plans of the cabinet shake-up, Al Arabiya reported Monday.
A disgruntled crowd hurled stones at President Moncef Marzouki and the parliament speaker in a central Tunisian town, a media report said Tuesday.
Presidential guards loyal to deposed President Zine El Abidine Ben Ali were involved in the shootout.
Unrest sweeps the North African country after its longtime President was forced out by protests.
Day in Pics: 19th September
Showbiz World - September 19, 2014
iPhone6 fever grips the world