Aftermath of a blast in St. Petersburg metro

People lay flowers at Tekhnologichesky institute subway station in St Petersburg, Russia on April 4, 2017. Russian police continue investigations after 14 people were killed and dozens injured in St Petersburg following explosions between two of the city's underground stations. The suspect is reportedly a native of Kyrgyzstan named as Akbarzhon Jalilov who obtained Russian citizenship, according to the Central Asian country's security service. Authorities in St Petersburg have declared three days of mourning.