DHAKA: The man suspected of killing 14 people by bombing a St Petersburg train is a native of Kyrgyzstan who obtained Russian citizenship, the Central Asian country's security service says.

Forty-nine people were injured in the explosion between two underground stations on Monday afternoon, reports the BBC.

The Kyrgyz security service named the bomber as Akbarzhon Jalilov, who it said was born in Osh in 1995.

There are conflicting reports as to whether he was a suicide bomber.

Kyrgyz state media said the country's security service was “maintaining contact with the Russian secret service for further investigation”.

Authorities in St Petersburg have declared three days of mourning.

The death toll was raised from 11 to 14 on Tuesday morning after three people died in hospital.

Russian President Vladimir Putin, who was in St Petersburg - his home city - when the blast occurred, visited the scene on Monday evening and laid flowers at a makeshift shrine.

Russian investigators have given few details. No group has said it was responsible.

World leaders rallied behind Russia in condemning the blast.

The White House said President Donald Trump had spoken to Putin by phone and offered “full support” in bringing those responsible to justice.

St Petersburg's metro system, which is used by more than two million passengers every day, has not suffered previous attacks.

Several transport hubs in Russia have, however, been attacked. In 2010, 38 people died in a double suicide bombing on the Moscow metro.

And a year later, a bomb exploded on a high-speed train travelling between Moscow and St Petersburg, killing 27 and injuring another 130.

Both attacks were claimed by Islamist groups.

BDST: 1514 HRS, APR 4, 2017
AP