“The director of school No. 51 of Makhachkala was hospitalized in the Republican Clinical Hospital of Emergency Medical Aid with a heart attack,” the ministry said.

Earlier, the Investigative Committee opened a criminal case of negligence against the director of the educational institution and his deputy.

According to the investigation, a fight broke out at a local school between a 15-year-old student and his classmate, during which he stabbed, and later the wounded teenager died in hospital.

A criminal case has been initiated against the student.

The director and deputy director of the school have been dismissed.