to Russia's military involvement in Syria, resulting in arrests. No public transport system in Russia had been bombed since the 2010 Moscow Metro bombings.ISIS propaganda was being circulated prior to this incident. It encouraged supporters to launch strikes on Moscow. ISIS propaganda showed bullet holes through Putin's head and a poster circulated before the attack of a falling Kremlin and included the message "We Will Burn Russia." On 22 April 2017, two people were shot and killed in an attack in a Federal Security Service office in the Russian city of Khabarovsk. The gunman was also killed. The Russian Federal Security Service said that the native 18-year-old perpetrator was a known member of a neo-nazi group. On 27 December 2017 a bomb exploded in a supermarket in St Petersburg, injuring thirteen people. Vladimir Putin described this as a terrorist attack. 2019 Several terrorist incidents occurred in Russia during the year of 2019: On March 13, two perpetrators opened attacked Federal Security Service (FSB) officers with automatic weapons and grenades when stopped for questioning in Stavropol of the Shpakovsky district. Both Perpetrators where killed in the confrontation. Later, Russian authorities reported they were planning a terrorist attack in accordance to their affiliation with ISIS. On April 8, ISIS (claimed to have) set off an explosion at Kolomna, a city near Moscow. The attack did not result in any casualties. On July 1, ISIS claimed responsibility for an attack on a police officer at a checkpoint in the Achkhoy-Martonovsky district of Chechnya, who was stabbed to death. The attacker was shot and killed as he threw a grenade at the other officers. On December 19, someone living in the Moscow region opened fire near the FSB headquarters in Moscow and caused 6 casualties; 2 killed and 4 wounded. Subsequently, the shooter, later identified as Yevgeny Manyurov, a 39-year-old ex-security guard, was killed onsite. 2021 A German court sentenced Russian agent Vadim Krasikov to life imprisonment for the murder of Zelimkhan Khangoshvili which the judge called "state terrorism". 2022 On April 14, the Ukrainian parliament endorsed a bill recognizing Russia as a terrorist state, whose political regime's aims include genocide, physical destruction, mass killings, international crimes against civilians, use of prohibited methods of war, destruction of infrastructure, and artificial humanitarian catastrophes in certain regions of Ukraine. On May 10, Lithuania's parliament designated the Russian Federation a terrorist state and its actions in Ukraine