Romania’s top constitutional court on Friday dramatically cancelled high-stakes presidential elections after security services warned Russia was mounting “aggressive” hybrid attacks against the Eastern European country.

The court decision plunged the strategically important EU and NATO member state into political chaos, inflaming divisions that opened up after a far-right outsider came from nowhere to win the first round in the presidential contest two weeks ago.

Ultranationalist Călin Georgescu benefited from a TikTok campaign that was similar to influence operations run by the Kremlin in Ukraine and Moldova, according to declassified Romanian intelligence documents. The files said Moscow was targeting Romania as an enemy state, using “aggressive hybrid action,” a view backed by the United States.