RUSSIA — Investigators have named the man responsible for blowing up a metro train in St. Petersburg on Monday.

TASS reports that the Russian Investigative Committee identified Kyrgyzstan-born Russian national Akbardjon Djalilov as the perp who blew himself up in the St. Petersburg metro.

A surveillance photo shows Djalilov walking through a metro station, carrying what was later found to be an incendiary device inside his backpack.

He detonated the device around 2:40 p.m. inside a train car that was moving between the Tekhnologichesky Institut and Sennaya Ploshchad metro stations.

Train driver Aleksandr Kaverin reportedly heard the sound of the device going off, but followed protocol and continued on to the next station where passengers were let out. Fourteen people are dead as a result of detonation, with 49 others injured.

A second, more powerful device with Djalilov’s DNA on it was found and defused at Ploshchad Vosstaniya station. It contained a kilo of TNT and ball bearings, and was hidden inside a fire extinguisher that was placed in a bag on the platform.

A motive has yet to be established. No group has so far claimed responsibility for the atrocity.