Minnikhanov's office later added that a teacher was also killed. "Other accomplices haven't been established, an investigation is underway", Minnikhanov said after visiting the school, noting that security had been restored to the school.
Ambulances and police cars and a truck are parked at a school after a shooting in Kazan, Russia, Tuesday, May 11, 2021.
Following the attack, Kremlin spokesman Dmitry Peskov said President Putin had ordered the chief of Russia's National Guard to "work out as a matter of urgency new regulations on the types of weapon that can be in civilian circulation and that can be owned by the public".
According to the Interfax news agency, two gunmen opened fire in the school, and one of them - a 17-year-old - has already been apprehended.
Images broadcast on state television from the scene showed dozens of people outside the school building with fire services and police vehicles lining nearby streets.
"I was in class, I first heard an explosion, then gunshots", TASS quoted a teacher as saying.
A gunman attacked a school Tuesday morning in the Russian city of Kazan, sending students running out of the building as smoke poured from its windows.
Tatarstan President Rustam Minnikhanov had arrived at the scene of the shooting, news agencies reported.
School shootings are rare in Russian Federation.
One of the last major shootings of its kind took place in Russian-annexed Crimea in 2018 when a student at a college killed 19 people before turning his gun on himself.
In October 2018, a teenage gunman killed 20 people at the Kerch technical college in Crimea, the peninsula Russian Federation annexed from Ukraine in 2014.
Eight children and one teacher are reportedly dead.
"The terrorist has been arrested".