MOSCOW, RUSSIA -- APRIL 3, 2017: Floral tribute and candles left by mourners in memory of bombing victims in Moskovsky Prospekt Street at the entrance to Tekhnologichesky Institute station of the St Petersburg Underground; a bomb exploded in a train at 14:40 Moscow time; according to Russian National Antiterrorism Committee several people were killed in the explosion. Peter Kovalev/TASS (Photo by Peter Kovalev\TASS via Getty Images)
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TASS Peter Kovalev