Security has been heightened in Moscow and the key strategic city of Rostov-on-Don after the owner of a private military contractor stepped up his direct challenge to the Kremlin, APA reports citing foreign media.
Yevgeny Progozhin, who owns the private Wagner force, said his forces have reached Rostov – the southern base for Russia’s military.
The security services reacted immediately by opening a criminal investigation into him.
Mr Progozhin, who has called for an armed rebellion to oust Russia’s defence minister Sergei Shoigu, said his forces faced no resistance from young conscripts at checkpoints.