Yes, trips from Ukrainian side behind cordon have already happened. However, they were the most parody rallies of Russian volunteers fighting under Ukrainian command. They ended with the temporary “liberation” of respective villages and then the retreat to Ukrainian territory. Now it may seem like a akin local incident. erstwhile the first reports of him appeared in Russia last Tuesday, they were calming at first. "The Armed Forces of Ukraine attempted to cross the border of the Kursk region, but they were thwarted by soldiers of the Border Service and the Armed Forces of Russia", provided the news agency RIA Nowosti, citing the authorities of the region.
