As part of covert mobilization, Russia manages to mobilize about 20,000 additional people every month, spokesman for the Main Intelligence Agency of the Ministry of Defense of Ukraine Andriy Yusov has said.

"This process [of mobilization] continues. And as part of covert mobilization, the rashists manage to mobilize about 20,000 people every month. Additionally. New mobilization measures are also being prepared," he said on the air of the national telethon on Monday.

According to Yusov, "all figures are known and are being studied."

At the same time, intelligence officials said it is not enough to mobilize people, they still need to be trained, and there is not enough training base in Russia, so Belarus and Belarusian training grounds are used.