In the evening 50 people have been evacuated from a St.Petersburg supermarket after an explosion (18:55 local time, when the maximum of clients were shopping). 10 among them with injures delivered to hospitals, two in critical condition, according to city media. ФСБ приехала на взрыв в «Перекрестке» https://t.co/iAE2drrVPq https://t.co/UmAvIIvgsW — Фонтанка. Новости (@fontanka_news) December 27,…