"They wanted to assassinate the leadership of Ukraine: our President and Prime Minister. That was the goal and a couple of them were sent to Ukraine without any success," Markian Lubkivskyi, an advisor to Ukraine's defense minister said.

Read here Russia is moving troops into Ukraine from Georgia, - US defense official

Lubkivskyi said the plot was confirmed by Ukraine’s intelligence service and special forces in charge of protecting Zelensky.

"All these documents and the necessary proof will be presented to the International Court," he said, adding that he couldn’t reveal more due to operational reasons.