School shooting has shaken Russia: Putin

Russian President Vladimir Putin says the deadly school shooting in Kazan "has shaken" the country and ordered the government to revise school security protocols and tighten control over civilian gun ownership.

"The tragedy has definitely shaken all of us," Putin said, speaking at a meeting with government officials via video link on Thursday.

"All of Russia... stands with Tatarstan, with Kazan residents, in the difficult days."

A gunman on Tuesday morning attacked a school in Kazan, the capital of Russia's Tatarstan republic 700km east of Moscow.

Nine people - seven students and two school employees - were killed, and more than 20 others, mostly children, were hospitalised with injuries.

Three wounded children remain in grave condition, Health Minister Mikhail Murashko told Putin at the government meeting on Thursday.

The authorities gave no motive as to why Ilnaz Galyaviyev, 19, who was arrested in the shooting, carried out the attack at the school he reportedly used to attend.

He appeared in court on Wednesday, charged with murder, and was ordered to pre-trial detention for two months.

Officials said he legally owned a firearm and exhibited erratic behaviour after the arrest.

Putin said on Thursday that in order to prevent attacks like the one in Kazan, the authorities need to "seriously raise the requirements for civilian gun owners and tighten control over civilian gun circulation".

"Decisions here need to be well-founded, and definitely tough," the Russian president said, adding that officials granting gun ownership permits need to be held accountable for their actions as well.

Putin ordered the head of Russia's National Guard to put together a proposal on how to change gun ownership regulations.

The president also said that the tragedy in Kazan highlighted problems with school security and tasked the government with introducing a unified security and anti-terror protocol in Russian schools.

Guns are tightly restricted in Russia.

Civilians over 18 can obtain permits for hunting or sports firearms after medical checks.

It is illegal to own handguns, guns that shoot in bursts or that have magazines with more than a 10-cartridge capacity.

National Guard head Victor Zolotov proposed raising the minimum age for gun possession from 18 to 21 at Thursday's government meeting.

He also suggested introducing psychological tests for those seeking to obtain a firearm and barring private clinics from issuing medical certificates needed for a gun permit.