Ukrainian President Petro Poroshenko has said that Ukraine is involved a new type of warfare.

"Ukraine is in a state of war. This is a new type of warfare – with the use of professional subversive groups, mercenaries, volunteers, and the local population. And these volunteers and the local population have very 'washed' brains in a huge part due to the information war," he said during a graduation ceremony for the students of the National University of the Ukrainian Defense Ministry Wednesday.