According to the New York Times, Kyrgyz officials working together with Russian Federation released Akbarzhon Dzhalilov's name to the public.
The Kyrgyz National Security Committee (GKNB) named the prime suspect as Akbarzhon Jalilov, a 22-year-old with Russian citizenship, born in the Kyrgyz city of Osh in 1995.
The Russian news website Gazeta.ru reports that the bombs were concealed in vehicle fire extinguishers, with ball bearings taped to the outside.
"The man has been identified but his identity will not be disclosed for now in the interests of the investigation", the statement added.
Petrenko's statement, which the NYT and other major outlets also carried, refrained from releasing Dzhalilov's name to the public. They and other Russian investigators have also hinted, though unofficially, that the St. Petersburg bombing may have been carried out by the Islamic State - either directly through Dzhalilov's recruitment, or indirectly via his inspiration. The attack follows a long string of bombings of Russian planes, trains and transportation facilities. He stayed in St. Petersburg when his parents moved back to Kyrgyzstan.
The entire subway system in St Petersburg, a city of five million, was shut down and evacuated before partial service resumed six hours later.
The first major bombing in Russian Federation in more than three years, it occurred while President Vladimir Putin was in his home city of St. Petersburg hosting the president of Belarus.
"It is our investigators who will be making the decision", the presidential spokesman said. The Islamic State group has repeatedly threatened revenge attacks.
"At that moment there was no question of fear".
Dmitry Peskov told reporters on Tuesday that the fact that Putin was in the city when the bomb went off, although several dozen miles away from where he was hosting talks, "makes one pause" and is "something for the intelligence agencies to analyze".
She said criminal investigators found traces of his DNA on the explosive suitcase that had been left behind in the Ploschad Vosstania station, which was deactivated by police before it could be detonated.
The man suspected of killing 11 people in a St Petersburg train is in his early 20s and from Central Asia, Russian media report.
Russian President Putin held a meeting with security and law-enforcement services.
There was no immediate claim of responsibility for the Monday afternoon attack, which came while President Vladimir Putin was visiting the city, Russia's second biggest and Mr Putin's hometown. "I had seen her just hours earlier". US President Donald Trump described it as "a bad thing" while German Chancellor Angela Merkel said it was a "barbaric act".
According to the Russian Health Ministry's latest data, 14 people were killed and 49 were hospitalized with injuries in the subway bombing.