7:57 pm today
By Kosta Gak, Anna Chernova and Helen Regan for CNN
The attacks on St Petersburg come as a major business event known as Russian President Vladimir Putin's version of Davos gets underway in the city.
Russia says it has downed hundreds of drones over its territory, including about 60 over the Leningrad region Tuesday night, in a Ukrainian attack as a major economic forum gets underway.
Saint Petersburg governor Aleksandr Beglov said three districts were targeted as part of an overnight Ukrainian drone assault that wounded several people and damaged infrastructure facilities.
