Mourning for those killed in St. Petersburg

In St. Petersburg, a three -day mourning began on the dead in the subway today. 14 people became its victims, more than 50 were injured. A criminal case was instituted under the article of the attack. People carry flowers to an impromptu memorial at the entrance to the metro station of Sennaya Square. In many cities of Russia, security measures have been strengthened, primarily in the regions in the north-west of the country.