AN EXPLOSION in Russia has caused chaos after a blast at a busy St Petersburg supermarket.
Ten people are reportedly injured and over 50 people have been evacuated from the shop after the St Petersburg explosion on December 27.
The blast reportedly occurred inside a locker inside the busy supermarket.
Terrifying footage taken from the scene of the St Petersburg explosion shows frantic emergency services workers head toward the supermarket after the reported blast.
The video shows multiple medical and police parked outside the Giant Hall leisure centre, where the Perekrestok supermarket is located.
Russian media outlet Sputnik News said the blast was a result of “an explosion of an unidentified device”.
Reports say preliminary data shows that a device stuffed with damage agents is likely to be the cause for the St Petersburg explosion.
A local emergencies ministry official told TASS news agency: “There was a bang.
“Emergency personnel are already on the scene.
“The evacuation has been completed, and there was no fire.”
Officials are reportedly treating their investigation as a “potential mass homicide attempt”, according to local media.
Other reports claim that the explosion in Russia was equivalent to 200g of TNT.
The explosion ripped through the store on the ground floor of the leisure complex, which is traditionally packed with shoppers in the days before the New Year celebrations.
Russian outlet RT said there “were thousands of visitors inside the shopping complex in the northeast of the Russian city, during what is the business time of the year in the run-up to the New Year celebrations”.
Police, bomb-disposal teams and rescuers are on the scene, as nine people have been hospitalised after the blast.
"At the moment the store is closed, buyers and staff have been evacuated. Special services are working at the scene. There is no more detailed information at the moment," the press service of the retail chain told Sputnik.