A 19-year-old Tunisian was killed overnight by a Landmine in the western border region where the army has been battling Islamist militants, an interior ministry source said on Wednesday. The man "entered a closed military zone and was killed when a Landmine exploded", the source said, without elaborating. The incident came a day after six members of the Tunisian security forces were wounded by a roadside bombing in the mountai**us Kef region, farther **rth. Since late 2012, security forces have been battling jihadists hiding out in the remote western region, parts of which were declared "zones closed for military operations" in April.