It was one of the deadliest days in Ukraine's history.<br/> <br />Clashes between protesters and snipers left more than 100 people killed.<br/> <br />It was the deadly precursor to then-President Viktor Yanukovich fleeing Kiev on February 21.<br/> <br />Now, the head of the state security service blames those shootings on the Berkut riot police, and says their orders came directly from the top.<br/> <br />(SOUNDBITE) (Ukrainian) STATE SECURITY SERVICE (SBU) CHIEF, VALENTYN NALYVAICHENKO, SAYING:<br/> <br />"What was planned as an anti-terrorist operation, which was in fact the mass killing of people, took place under the direct leadership of ex President Yanukovich."<br/> <br />At a news conference in Kiev, the official also said unidentified Russians were present throughout the conflict.<br/> <br />(SOUNDBITE) (Ukrainian) STATE SECURITY SERVICE (SBU) CHIEF, VALENTYN NALYVAICHENKO, SAYING:<br/> <br />"On January 20th, transport planes from Russia landed in Gostomel and Zhulyany airports. They brought 5,100 kilograms of explo
