TUNIS- Tunisian security forces killed four Islamist militants in clashes near the border with Algeria late on Monday, officials said. Jihadists have launched a string of attacks on military checkpoints and patrols, and Islamic State last year claimed responsibility for a suicide bombing in Tunis and gun attacks targeting foreign tourists at a museum and a beach hotel. 'Special forces units killed four terrorists in Ain Jafal region between Sbeitla and Jelma in clashes,' the interior ministry said in a statement without giving more details. Tunisia has been held up as a model for democratic transition since the 2011 uprising against Zine El-Abidine Ben Ali. But the attacks have battered its economy, particularly its tourist industry.