A soldier reportedly went “crazy” while carrying a machine gun during a military parade in eyeshot of Russian President Vladimir Putin, according to the FSB security service.
Nikita Eroshenko, 22, went out of control on Red Square leading officers to jump in and tackle the conscript.
The incident – which was swept under the carpet at the time – came about during Wednesday’s Victory Day parade in Moscow as the Russian president watched on.
The event marked the 75th anniversary of the end of the Second World War.
In a video, security officers can be seen suddenly pouncing on the errant soldier in a corner of Red Square.
Some accounts say he had been identified by the FSB as a terrorist threat amid the 14,000 troops marching past Putin.
“FSB military counterintelligence officers allegedly prevented a serious incident, and even more so – a terrorist attack,” a source told Komsomolskaya Pravda.
The soldier – who was dressed in the uniform of the Red Army in 1945 – evidently went “wild” after he was told he would not be marching in front of Putin.
He went “crazy” and smashed his Soviet-era submachine gun into three windows off a Federal Security Service vehicle.
He was around 500ft across the Red Square cobbles from Putin when the incident occurred at the start of the parade.
There was no shooting from the gun and one report said the weapon was unarmed.
Yet news outlet BAZA reported: “Allegedly, right before the start of the parade, FSB counterintelligence officers identified a suspected terrorist who was preparing something during the event on Red Square.”
A criminal case has been opened against Eroshenko, from Kaluga, according to some reports.
One TV report by pro-Kremlin journalist Vladimir Soloviev suggested the soldier had confessed to a protest aimed at worsening Russia’s ‘international reputation’.
“It was a protest against the existing regime and the Federal Security Service. I believe that they have acted unfairly against me,” he was quoted as saying.
However other accounts say the conscript had a “nervous breakdown” ahead of the parade and was furious that he had been barred from marching.
An investigator asked him: “So you intended to arrange a provocation during the parade?”
The soldier replied in a trembling voice: “How is it? What is it?.”
TASS reported: “According to preliminary data, the soldier suffered a nervous breakdown.
“The criminal case was not instituted, the soldier was sent to psychiatrists.”