An explosion rocked the entrance of a Federal Security Service (FSB) building in Russia's northern city of Arkhangelsk on Wednesday morning in what the Investigative Committee has qualified as a terrorist act.

Three FSB officials were reportedly injured in the explosion.



Investigators said that a 17-year-old boy had been identified as the attacker, adding that the explosion had been caused by an improvised explosive device.



The boy reportedly brought a bag to the entrance of the FSB building that exploded in his hands, a spokesperson for the National Anti-Terrorist Committee was cited as saying by TASS on Wednesday morning.

"According to preliminary information, the individual entered the building and took an unidentified object out of a bag, which exploded in his hands after some time, as a result of which he suffered injuries that led to [his] death," the spokesperson said.