The President specified that the matter does not only concern a terrorism version, but also a common and criminal ones.
“Law enforcement agencies and special services are working and doing everything in order to identify the causes of the incident, to give a full assessment of what happened,” — the head of state said.
“I've already spoken to the heads of special security services, with the director of the FSB (The Federal Security Service of Russia – editor’s note,” — the Vladimir Putin noted.