Armed gunmen with a “terrorist background” robbed a Tunisian bank in the town of Kasserine near the Algerian border on Wednesday. Eleven men, some armed with Kalashnikov assault rifles, had hijacked a car and four then stormed the bank and seized an unknown amount of cash, a Tunisian security official said. They later escaped. The security official had no further details. Investigations are underway in the attack and to find the perpetrators, said security sources. Tunisia has been on high security alert since 2015 when ISIS gunmen killed dozens of tourists in a museum in the capital and on a beach in the resort city of Sousse. Since then security has much improved with only sporadic smaller attacks, allowing the vital tourism industry to recover as foreigners have returned to Tunisia’s Mediterranean beaches.