Russian investigators have confirmed that the St Petersburg Metro blast earlier today was an act of terror. At least 10 people have been killed and 43 wounded. Many of the wounded were taken to nearby hospitals in ambulances, some by medical helicopter crews.
Officials say that the original blast happened while the train was traveling between two stations in the centre of the city, traveling from the Sennaya Ploshchad to Technological Institute station (Сенная и Технологический институт).
A second bomb was found by investigators at the Plaza of the Revolution station. That bomb failed to trigger. City officials shut down the entire Metro system in Russia's second-largest city and the country's "northern capital" until the entire system could be checked.
President Putin and Prime Minister Medvedev expressed their condolences and promised that the Russian Investigative Services and the state security services would conduct a thorough investigation.