According to him, the secret service has gotten letters revealing the plans to destabilize the situation in 10-15 regions of Ukraine in November.

Read alsoSBU: Notorious MP Novinsky flees Ukraine to Greece on board his planeThe information is so detailed that it contains even budgets of the planned operations.

"This information has been found during an operation, so I cannot say more than I've told... We see that the Russian Federation does not give up the idea of destabilizing the situation in Ukraine," Hrytsak said at a briefing in Odesa.