MOSCOW, Russia - At least fifteen people, including 11 pupils, have been killed in a mass shooting at a school in Russia.

Two dozen people, including 22 children, have also been injured in the attack, which occurred at a school in the city of Izhevsk in Russia's Urals region, 970 km (600 miles) east of Moscow. on Monday.

The man alleged to have been responsible for the attack has been identified as Artyom Kazantsev, 34, a former student at the school. He was armed with two handguns and was wearing a black T-shirt emblazoned with Nazi symbols. He was also wearing a ski mask.

Following the slaughter, Kazantsev apparently killed himself.

Families of the students and teachers and other staff of Izhevsk's School No. 88 rushed to the scene, which was almost instantly populated with law enforcement officers and a swarm of ambulances.

The Investigative Committee, now heading the investigation into the attack, has confirmed a number of teachers and two security guards at the school died in the attack.

Izhevsk is known as the Armory Capital of Russia as it is a major hub for defense industries, including the manufacturer of the AK-47. It is the capital of Udmurtia and has a population of over 600,000 people.

The governor of Udmurtia, Alexander Brechalov, said the gunman was registered as a patient at a psychiatric facility.

The Investigative Committee, now heading the investigation into the attack, has confirmed a number of teachers and two security guards at the school died in the attack.

"Currently investigators are conducting a search of his (the alleged shooter's) residence and studying the personality of the attacker, his views, and surrounding milieu," the Investigative Committee said in a statement released later on Monday. "Checks are being made into his adherence to neo-fascist views and Nazi ideology."

"President Putin deeply mourns the deaths of people, children, at a school where there was a terrorist attack by a person who apparently belongs to a neo-fascist group," Kremlin spokesman Dmitry Peskov told a press conference Monday.

"The president wishes for the recovery of those injured as a result of this inhuman terrorist attack," Peskov added.