These are the first images of the carnage inside the St Petersburg metro train blown up by a bomber named as a Russian citizen from former Soviet state Kyrgyzstan.
At least 14 people were murdered and 50 injured in the blast and horrifying pictures show bodies, blood and wreckage strewn across the carriage of the train blown up between Sennaya Ploshchad and Sadovaya metro stations in Russia's second city.
Russian citizen Akbarzhon Jalilov, 22, who was born in Kyrgyzstan, has been named by security services as the suspected attacked who also planted a second device hidden in a fire extinguisher that failed to explode.
It is unclear whether the attack was a suicide blast or whether the bomber got away.
This morning, the city's transport bosses closed four stations, including Sennaya Ploschad, and called in emergency services following an anonymous call warning of another attack.
CCTV images of the suspect in Monday's bombing have been released, showing him in a red Parka jacket, wearing glasses and a dark green beanie hat and carrying a rucksack on his back through the Metro.
Another CCTV image shows him walking along the street with both his fists clenched - potentially because he was clutching the trigger for his bomb. Police believe he has close links to radical Islamists.
Jalilov's home country of Kyrgyzstan, which borders Kazakhstan and China in central Asia, is predominately Muslim and has seen up to 500 citizens travel to Syria to join ISIS. Boston Marathon bombers Dzhokhar and Tamerlan Tsarnaev were also born there. It was the last of the Soviet republics to declare independence in 1991.