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The State Department warned U.S. citizens on Friday against traveling to southeastern Tunisia near the Libyan border because groups affiliated with Islamic State militants have targeted Tunisian security forces and tourist sites in the region.
The warning, which is more serious than the travel alert issued a month ago, calls for U.S. citizens to avoid traveling near the Libyan border or the mountainous areas of western Tunisia and to exercise caution in all places in Tunisia frequented by tourists. The country's tourism revenue has plummeted.
Dozens of foreigners were killed in two major attacks by Islamist militants in Tunisia last year.
On March 22, President Beji Caid Essebsi renewed Tunisia's state of emergency, which was put into effect after last year's attacks, extending it three months until June 22.
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"Travelers contemplating trips to the interior of Tunisia should assess local conditions and routes when making travel plans," the State Department warned.
"In particular, all travel south of the designated military zone in the south must be coordinated in advance with Tunisian authorities."