Journalist (Russian): «So, is it a common grief?» Mourner (Russian): «Certainly, it is a common tragedy. We have to all stick together. Just as we did last year.» Hundreds gathered and laid flowers at the Tekhnologichesky Institut metro station in St. Petersburg on Tuesday to commemorate the victims of the deadly metro bombing one year ago. «It is a common tragedy. We have to all stick... Еще together,» one of the mourners said. St. Petersburg Metro Chief Vladimir Gariugin unveiled a memorial book for the first anniversary of the terror attack, consisting of stories of the victims and people’s reactions to the tragedy. A total of 15 people were killed and more than 50 others were injured after an unidentified explosive device went off between St. Petersburg's Institute of Technology and Sennaya Ploschad metro stations on April 3, 2017. The suicide bomber was identified as Kyrgyzstan-born Russian citizen Akbarzhon Dzhalilov.