Special security forces were deployed to the school in south-eastern Turkey’s Sanliurfa province, where students were evacuated, local governor Hasan Sildak told reporters, AFP reported.
Television footage showed ambulances standing by outside the school in the Siverek district as students fled the building in panic.
Sildak identified the attacker as a former student at the school, born in 2007.
“He took his own life when cornered by police,” the governor said.
“We have evacuated the school and will carry out a thorough investigation into this tragic incident,” he added.
Local media reported that most of the wounded were students.