Interfax reports said Putin arrived at Technologichesky Institute station entrance to lay flowers, expressing his condolences to the families of the victims.
11 people were killed and 45 injured in the explosion that occurred in St. Petersburg subway between Sennaya Ploschad and Technologichesky Institute stations on Monday, Russian Minister of Health Veronika Skvortsova said to reporters.
Meanwhile, the UN Security Council on Monday condemned "in the strongest terms" the terrorist attack in St. Petersburg, Russia which killed at lest 10 people.
In a press statement, the 15-nation council expressed deep sympathy and condolences to the victims and their families, and also to the people and government of Russia.
"The members of the Security Council underlined the need to bring perpetrators, organizers, financiers and sponsors of these reprehensible acts of terrorism to justice," said the statement.
The members of the Security Council also stressed that those responsible for these killings should be held accountable and meanwhile urged all states to cooperate with Russia in this regard.