Vitalii Malikov, head of the Antiterrorist Centre (ATC) under the Security Service of Ukraine, told Dzerkalo Tyzhnia, Censor.NET reports.
"There are about 8,500 Russian career officers, as they come and go on rotational basis, dislocated in the Donbas right now," he said.
Read more: Terrorists use heavy weapons in Donbas again - ATO press center
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