It was announced that an additional 40–50 people died in the fire that engulfed the Trade Union building after police attempted to seize it the night before. On 20 February, gunfire killed 60 people, according to an opposition medical service. In total, more than 100 people were killed and 2,500 injured in clashes with security forces. The death toll included at least 13 police officers, according to Ukrainian authorities. During the 2014 Hrushevskoho Street riots of 22–25 January, 3 protesters were killed by firearms. Oleh Tatarov, deputy chief of the Ukrainian Interior Ministry's Main Investigative Directorate under Yanukovych, claimed in January that "[t]he theory we are looking at is the killing was by unidentified persons. This is an official theory, and the unidentified persons could be various people, a whole host of them… It could have been motivated by disruptive behavior, or with the aim of provocation." He then claimed the cartridges and weapons used in the shootings were not police issue. Forensics experts found that protesters were killed with both buckshot and rifle bullets, while medics confirmed the bullet wounds to be from firearms such as the Dragunov sniper rifle (7.62×54mmR) and possibly 9×18mm Makarov cartridges. A report published on 25 January by Armament Research Services, a speciality arms and munitions consultancy in Perth, Australia, stated that the mysterious cufflink-shaped projectiles presumably fired by riot police on Hrushevskoho Street at protesters during clashes were not meant for riot control, but for stopping vehicles, busting through doors and piercing armour. The bullets were reported to be special armour-piercing 12-gauge shotgun projectiles, likely developed and produced by the "Spetstekhnika" (Specialized Equipment) design bureau, a facility located in Kiev and associated with the Ministry of Internal Affairs. On 31 January 2014, Vitali Sakal, first deputy chief of the Ukrainian Interior Ministry's Main Investigative Directorate told a press conference that "[w]e are pursuing several lines of inquiry into these murders, including [that they may have been committed] by Berkut (special police unit) officers." On 31 January 2014 during a live broadcast on television channel "Rossiya", the far-right Russian politician Vladimir Zhirinovsky expressed threats towards the protesting events in Kiev stating the following:  On 10 October 2014 Reuters published a report about their examination of Ukraine's probes into the Maidan shootings. They have uncovered "serious flaws" in the case against Berkut (special police force) officers arrested by the new Ukrainian government and charged with murder of 39 unarmed protesters.