Petersburg authorities say 50 injured in metro blast remain hospitalized

Russian Prime Minister Dmitry Medvedev described the attack as a "terrorist act", but authorities have released no specifics on who they believe is responsible, and no group has yet claimed the attack as their handiwork. Alexander Zhilkin, governor of this region hundreds of miles away from the insurgency in the North Caucasus, said the suspected Islamists are on the run.

The 22-year-old, who has been named as Akbarzhon Jalilov, detonated a nail bomb on a train as it travelled between the stations of Sennaya Ploschad and Technologichesky Institute at 2:30pm local time on Monday.

Condemning the bombing in strongest terms, President Ghani said the Afghan nation can feel the pain of the incident more than anyone else since the Afghan people have always been suffering and are victims of terrorism.

"We can state today that 14 people have died", Veronika Skvortsova told journalists, adding that 49 people are still hospitalised after the explosion on Monday afternoon.

A three-day mourning period has started.

Russian news agency RIA Novosti reported on Tuesday that authorities had received a warning of a possible second attack at the same Sennaya Ploshchad metro station. The rebellion there has been largely crushed, but Russia's military intervention in Syria has now made it a potential target for attacks by the ISIS group, security experts say.

US President Donald Trump spoke Monday with Russian counterpart Vladimir Putin and pledged Washington's "full support" for Moscow's response to the deadly attack on the Saint Petersburg metro, the White House said.

Russian authorities will take all necessary measures to provide assistance to those injured in blasts in the St. Petersburg subway, Russian President Vladimir Putin said on Monday, according to the agency.

"He is a citizen of Russia", spokesman Rakhat Sulaimanov told AFP in Bishkek, adding that Kyrgyz security services are "in contact with Russian security services".

Trump expressed his condolences and condemned the attack, which killed 11 people and left dozens wounded.

As of yet, the identity of the man who planted the bomb which killed eleven people and injured 45 has not been revealed.

In December 2013, a suicide bombing at a train station in Volgograd killed at least 16 people.

The blast occurred in the tunnel between two key hubs in the system.

Russian ground transport has also been hit by extremists before, including in the Moscow metro and the Domodedovo airport, where a blast claimed by Islamic insurgents killed 37 people in 2011.

  • Leroy Wright