Ukrainian snipers opened fire on Russian troops, but Russian forces unleashed a heavy counterstrike from which the Ukrainians fled, as we read in Sev.tv:

According to the Mash channel, the Armed Forces of Ukraine attacked the Russian military in the Elizavetovka area on the border of the Sumy and Kursk regions. After a retaliatory strike, the enemy fled.

The Russian Armed Forces fired on snipers from Ukrainian territory. But after hitting back with heavy weapons from the Russian side, the Ukrainian military stepped back.

According to Gazeta.ru , there are no casualties among the civilian population and the military.