A 17-year-old male carried out a suicide bombing in an FSB office in Northern Russia. The FSB is the successor agency to the Soviet KGB and is responsible for security, border protection, counterterrorism, and counter-intelligence. The attack is unusual as it did not take place in the North Caucuses region and may not be connected to Islamic terrorism. In a message shortly before the attack an individual, who has not been confirmed as the attacker, identified himself as an anarchist and declared he would attack the FSB in the city because it “fakes cases and tortures people.”
Source: Russian suicide bomb kills one and injures three in FSB offices | World news | The Guardian