Ten people were reportedly injured and dozens evacuated after an explosion at a ‘Perekrestok’ supermarket in St. Petersburg, Wednesday. People who were close by at the moment of the explosion say they heard a blast and decided to check out what had happened. According to one witness, Viktoria Gordeeva, security at the supermarket needs improvement. «Once I left my milk package in a safe... Еще case [at the supermarket] for two days. I came back in two days, it was still there.» She added that apparently no one checks these safe cases. According to the Russian Investigative Committee's (IC) preliminary findings, a home-made explosive device full of shrapnel was detonated in a safe case encompassing one of the supermarket’s checkout lanes. It occurred at around 15:30 GMT. Police, emergency services, the Federal Security Service, and the Russian Investigative Committee are at the scene. A criminal case has been opened, according to the IC. The exact cause of the incident is currently under investigation.