Ukrainian President Petro Poroshenko made a scathing attack on neighbouring Russia on Wednesday, accusing it of "lies and manipulations" that even Soviet leaders at the height of the Cold War had not dared.
Relations between Kyiv and Moscow have never been worse since Russia annexed Crimea more than two years ago and Russian-backed separatist fighters subsequently took up arms against Ukrainian government forces in the east of the country.
Poroshenko used his speech at the annual gathering of world leaders for the United Nations General Assembly to accuse Russian President Vladimir Putin of using "hybrid warfare" to fuel global insecurity.
"Over the last year the practice of hybrid warfare has only spread and its effort has been seen by the whole of Europe, America and beyond," Poroshenko said.
He said Russia has used "political pressure, propaganda, interference with electoral processes, economic coercion, secret subversive military operations, cyber attacks and the misuse of diplomatic measures. These are methods of undeclared war."