Polish police and staff from the Warsaw city hall entered the campus Saturday morning, asking employees to leave the premises, Russian state news agency RIA Novosti reported.
The ministry described the action as “controversial, illegal and provocative.”
CNN has reached out to the Polish authorities for comment.
But a Polish foreign ministry spokesman told Reuters that while Russia had a right to protest, they were acting within the law.
The school will continue to operate from a different part of the Russian embassy, RIA added, quoting Russia’s ambassador to Poland Sergei Andreev.
Since the invasion of Ukraine in February 2022, Poland has been a staunch ally to Ukrainian President Volodymyr Zelensky.