President Vladimir Putin's spokesman on Thursday said that U.S. military assets in Poland are a threat to "our interests and our security."
"It's a third country that is building up its military presence on our borders in Europe," Dmitry Peskov told the BBC on Thursday. "It isn't even a European country."
Peskov's criticism follows President Obama's move to send over 3,000 U.S. soldiers to Poland in an effort to reassure NATO allies who remain concerned about Russia's aggressive behavior in Ukraine.
Russian Deputy Foreign Minister Alexei Meshkov also blasted Obama's policy, claiming that such a move is a "factor destabilizing European security," according to the BBC.
Hundreds of armored vehicles and and over 80 battle tanks are scheduled to be deployed in Eastern Europe in the coming days, with some U.S. troops already arriving in Poland on Thursday, the report noted.
The military forces will be rotated between Poland, Latvia, Lithuania, Romania, Bulgaria, Hungary and Estonia every nine months.
According to the BBC, Polish Undersecretary of State for Defense Tomasz Szatkowski welcomed the plan to deploy U.S. assets in the country in response to what he called Russia's "aggressive actions in our vicinity — I mean Ukraine and the illegal annexation of Crimea."