The attack on the headquarters of the 172nd Armored Brigade saw another soldier injured when suspected Kurdistan Workers’ Party (PKK) militants attacked at around 3 p.m. (1200GMT), the Turkish General Staff said in a statement.
Both were taken to Sirnak Military Hospital by helicopter and one later died from his wounds.
In a separate incident on Tuesday, eight members of the PKK and Kurdish Communities Union (KCK) surrendered to security forces in Sirnak province, the provincial governor’s office said in a statement.