A Tunisian policeman and three Islamist militants were killed in a security operation in a remote area near the Algerian border, police said.
Tunisia is one of the Arab world’s most secular nations and became a target for militants after being hailed a beacon of democratic change with an uprising against autocrat Zine Abidine Ben Ali in 2011. A presidential election is set for September 15.
“Our forces killed three terrorists after a clash after a 10-day follow-up as part of the pursuit of terrorist elements,” Police Colonel Houssem Jbebli said.
The dead policeman was the head of a station in Haidra, he added.
Prime Minister Youssef Chahed told Reuters Tunisia was still under threat from militant groups including Islamic State.
Tunisia suffered three major attacks in 2015: one at a museum in Tunis, one on a tourist beach in Sousse and one on presidential guards in the capital. All three were claimed by Islamic State.