According to him, in August 2015 the Armed Forces of Ukraine together with secret services liquidated 'Rusich' sabotage group of the terrorists, mostly comprising citizens of Russia, including career soldiers.
"Several thousand of Russian career officers and mercenaries were killed in the Donbas. All of them fell victims of Putin's policy," representative of SBU stressed.
As of today, the number of Russian military in the Donbas totals 6,000 people, Tkachuk added.
SBU press service also published personal data of several Russian soldiers killed in the Donbas.
Sergey Vorobiev, the 16th separate special purpose brigade of GRU, killed near Debaltseve, survived by his family and children.
Dmitriy Dutov, volunteer from Sochi. Killed near Debaltseve. Survived by his child.
Ruslan Shchaslivtsev, the 162nd separate recon battalion of the 7th guards paratroopers division. Killed in battles near Debaltseve. Survived by beloved wife.
According to available data, more than 1,600 soldiers from 26 military units of Russia have been killed. This information is not complete, the losses are much higher, the authority stressed.
SBU says that Russia deploys its elite military units for the war in the east of Ukraine, including career officers of the special forces of GRU, marines, motorized rifle soldiers, tankmen, and artillerymen. They also noted that Ukrainian secret services have operative information on almost every Russian soldier fighting in the Donbas.
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"We address mothers and wives of Russian military: stop your kids, your men, and fathers of your children. War in the Donbas is not Syrian safari - they would get killed!" SBU added.