Belarus is testing its rapid response forces in an unannounced military manoeuvre, the country's Defence Ministry said on Wednesday.
"The formations and units will have to practice aspects of combat readiness, marching to the commanded areas of operation and performing combat tasks," the ministry said on Telegram.
The ministry said the manoeuvre is intended to defend against ground and aerial attacks and the number of troops involved will be gradually increased.
The goal of the inspection is to check how quickly the intervention force can react to sudden crisis scenarios.
The Belarusian leadership stressed that the military exercise "poses no danger - neither to European society as a whole or to neighbouring countries in particular."
Russia's invasion of Ukraine was launched with Belarusian support.
The US and EU have imposed sanctions on Belarus because of the Ukraine war.
Belarusian leader Alexander Lukashenko has so far denied plans to participate in the Russian invasion by sending in the country's own troops.