A Tunisian soldier was killed in a shooting attack near the border with Libya, the country's defense ministry said on Wednesday.
A military patrol came under fire from an unknown source in the demilitarized border area in the southeastern province of Tataouine, the ministry said in a statement.
An investigation has been launched into the incident.
Tunisia has stepped up security measures along the porous border with Libya to combat trafficking and smuggling.
In 2015, a 250-kilometer-long buffer trench was dug along the border.
In 2013, Tunisia declared the southern border strip connecting it with Algeria and Libya a demilitarized zone, allowing entry only with authorized permits issued by the authorities.
The Tunisian-Libyan border spans approximately 500 kilometers, with only two land crossings: Ras Ajdir and Dehiba-Wazen.
