Russian President Vladimir Putin has put troops in central Russia onto full combat alert, just a day after Ukraine ordered a cease-fire with pro-Russian rebels.
Quoted by Russian state news agencies on Saturday, the nation's Defense Minister Sergei Shoigu said the alert in the central area that includes the Volga region and the Ural (Yer-rul) mountains will remain in force until next Saturday.
Along with the alert, some 65-thousand troops will take part in military drills.
Although Russia's central region does not border Ukraine, pundits say the move is another power display as tensions between Moscow and Kiev continue to bubble.
On Friday, Ukrainian President Petro Poroshenko ordered his forces to cease fire and halt military operations for a week.
The Kremlin has dismissed Poroshenko's peace plan as an "ultimatum."