ANKARA, April 15 (Xinhua) -- At least four people were killed and 20 others injured in a school shooting in southern Türkiye's Kahramanmaras city on Wednesday, several media reports cited Kahramanmaras Provincial Governor Mukerrem Unluer as saying.

The incident occurred around 1:30 p.m. local time (1030 GMT) at Ayser Calik Middle School in the Onikisubat district, where the attacker, an eighth-grade student, entered two classrooms to carry out the attack, Unluer said.

Four of the injured are reported to be in critical condition, he said.

According to unconfirmed information shared by local broadcaster NTV, the attacker was caught by a teacher or the principal at the school.

Turkish Justice Minister Akin Gurlek announced an investigation into the incident. Meanwhile, Interior Minister Mustafa Ciftci and National Education Minister Yusuf Tekin have reportedly set off for Kahramanmaras.

A publication ban has been issued demanding press organizations "respect the confidentiality of the investigation," Gurlek said.

The incident took place just one day after a school shooting in the Siverek district in southeastern Türkiye's Sanliurfa province, where an attacker, armed with a shotgun, entered the campus and injured at least 16 people, mostly students, before taking his own life. The attacker was a former student at the school.