 Russians kill each other on the battlefield. Over the past fortnight, up to 10 invaders have been killed in Serhivka Kursan Oblast by triggering mines placed by previous units of the Russian army. General staff of the Armed Forces of Ukraine reported it. Russian occupation forces continue to kill each other on the battlefield. In the village of Serhivka Kursan Oblast, from 15 June to the present, after completing yet another rotation on positions, up to 10 enemy servicemen of the 5th Army of Eastern Military District have been blown up by mines, which were placed by the units of the previous rotation. The general staff said, the military hazards include trenches and anti-tank obstacles, but Russian soldiers have also been busy laying thousands of land mines in Ukraine. Russia is using a mixture of anti-tank and anti-personnel mines. Mines are an integral part of defensive fortifications like those in Russian-occupied areas of southern and eastern Ukraine, which are usually designed to funnel infantry into positions that lead them vulnerable to counter-attacks and artillery barrages. Unlike Russia, Ukraine is one of 164 states to have ratified the 1997 Ottawa Treaty that seeks to eliminate the use of anti-personnel land mines.