damaged in the incident. 2015 Metrojet Flight 9268 was an international chartered passenger flight operated by Russian airline Kogalymavia (branded as Metrojet). On 31 October 2015 at 06:13 local time EST (04:13 UTC), an Airbus A321-231 operating the flight disintegrated above the northern Sinai following its departure from Sharm El Sheikh International Airport, Egypt, in route to Pulkovo Airport, Saint Petersburg, Russia. All 217 passengers and seven crew members who were on board were killed. Shortly after the crash, the Islamic State of Iraq and the Levant (ISIL)'s Sinai Branch, previously known as Ansar Bait al-Maqdis, claimed responsibility for the incident, which occurred in the vicinity of the Sinai insurgency. ISIL claimed responsibility on Twitter, on video, and in a statement by Abu Osama al-Masri, the leader of the group's Sinai branch. ISIL posted pictures of what it said was the bomb in Dabiq, its online magazine. By 4 November 2015, British and American authorities suspected that a bomb was responsible for the crash. On 8 November 2015, an anonymous member of the Egyptian investigation team said the investigators were "90 percent sure" that the jet was brought down by a bomb. Lead investigator Ayman al-Muqaddam said that other possible causes of the crash included a fuel explosion, metal fatigue, and lithium batteries overheating. The Russian Federal Security Service announced on 17 November that they were sure that it was a terrorist attack, caused by an improvised bomb containing the equivalent of up to of TNT that detonated during the flight. The Russians said they had found explosive residue as evidence. On 24 February 2016, Egyptian President Abdel Fattah el-Sisi acknowledged that terrorism caused the crash. 2017 On 3 April 2017, a terrorist attack using an explosive device took place on the Saint Petersburg Metro between Sennaya Ploshchad and Tekhnologichesky Institut stations. Seven people (including the perpetrator) were initially reported to have died, and eight more died later from their injuries, bringing the total to 15. At least 45 others were injured in the incident. The explosive device was contained in a briefcase. A second explosive device was found and defused at Ploshchad Vosstaniya metro station. The suspected perpetrator was named as Akbarzhon Jalilov, a Russian citizen who was an ethnic Uzbek born in Kyrgyzstan. Prior to the attack, Chechen separatists had been responsible for several terrorist attacks in Russia. In 2016, ISIS had plotted to target St. Petersburg due