VILNIUS, Lithuania (AP) — Lithuania defended Wednesday the decision not to allow Russian and Belarusian observers to monitor its upcoming presidential election, accusing both countries of spearheading campaigns that “pose a threat to our national security.”

The Organization for Security and Co-operation in Europe — which includes Lithuania, Russia and Belarus— usually sends multi-national observer teams to watch its 57 member states’ elections.

The election on Sunday comes at a time when Russia is making gains on the battlefield in Ukraine, where the war has entered its third year, fueling fears across all of Europe and especially in the strategically important Baltic region about Moscow’s intentions.

Lithuania’s Foreign Ministry in a statement Wednesday said the country had invited OSCE observers to monitor the election “except for the aggressor Russia and its supporter Belarus” and accused them of being a threat to the Baltic nation’s political and electoral processes.