Russian tactics near the borders of the Sumy and Chernihiv regions remain unchanged. Apart from using subversive reconnaissance groups, which have a favorable geography in the north of the Sumy region – numerous forests – Russian troops are also shelling settlements along the entire border strip, spokesman for the Siversk military unit Vadym Mysnyk told RBC-Ukraine. “But, just like the sabotage and reconnaissance groups’ attempts to break through, the Russian shelling is carried out along the entire border. There is no clear concentration in a particular area, which is one of the signs of prep…