The European Union on Friday condemned Russia for starting to remove buoys marking the country’s border with Estonia on the Narva River. 

“This border incident is part of a broader pattern of provocative behaviour and hybrid actions by Russia, including its maritime and land borders in the Baltic Sea region. Such actions are unacceptable,” EU foreign policy chief Josep Borrell said in a statement.

Estonian border guards said on Thursday that their Russian counterparts removed more than 20 buoys marking the border in the Narva River, which separates the two countries, overnight.

Prime Minister Kaja Kallas called it a border incident.