File photo of Ukrainian President Petro Poroshenko. (Reuters)
Ukraine's President Petro Poroshenko on Friday accused Russia of direct involvement in the killing of protestors in Kiev as the country marked the anniversary of the shooting of scores of demonstrators.
Poroshenko told relatives of those killed that Kiev's security service had testimonies from Ukrainian law enforcement officials saying top Kremlin aide Vladislav Surkov organised "groups of snipers" during the protests, a statement from the presidency said.
Poroshenko said that investigators had recordings of conversations between then-president Viktor Yanukovych and Russian security officials "in which they prepared the shooting of activists in advance," the statement said.
Moscow immediately dismissed the allegations, with foreign ministry spokesman Alexander Lukashevich labelling them "ravings, worthy of a psychiatric hospital".
Scores of demonstrators were gunned down a year ago on Kiev's Independence Square, or Maidan, at the culmination of months of protests that led to the toppling of Kremlin-backed Yanukovych.
Public anger is high in Kiev over the fact that no officials have yet been brought to justice for the killings of the protestors.
Low-ranking riot police are the only people currently awaiting trial over the shootings.
Ukraine accuses Yanukovych -- now living in exile in Russia -- of ultimately being responsible for the protestors' deaths.
Surkov is an influential Kremlin advisor who has been credited with constructing the system of "managed democracy" that has helped President Vladimir Putin cement his control over Russia.